Got picks of the cab..I'd love to see what it looks like.
Are you going for originality or just functionality.?
Do the two mini marquee lights work on the front of your cab..
Original joysticks...(not sure where to find the thick chrome stem type.
Looking on ebay I find this

these look to be the right ones)
http://cgi.ebay.com/JOYSTICK-RED-OV...3QQihZ008QQcategoryZ13718QQrdZ1QQcmdZViewItem
These look like originals,but I'm not sure if they are 8 way(ask before buying-I just send seller a question)they might be 4 way.
The black ones.
http://cgi.ebay.com/JOYSTICK-BLACK-...0QQihZ008QQcategoryZ13718QQrdZ1QQcmdZViewItem
I'd like to buy a set of the red tops for my Big Red 2 slot.
Note: the sticks above may be a tad longer then the originals...I bought a set off ebay(not sure from who) like 5 years ago for my Big Red.4 slot..They were the same as the originals,just that the chrome stem is longer.
They are fine,just if you want originals you may want to measure your original stick stem length then ask this seller if it measures the same.
Happs
http://www.happcontrols.com/joysticks/joysticks_amusement.htm
Buttons..
These "may" be what you want.
http://cgi.ebay.com/MVS-NEO-GEO-HAP...ameZWDVWQQrdZ1QQcmdZViewItem#ebayphotohosting
I bought a set of Happ buttons,2 sets...off Ebay and the ones they sent me(not this seller) were smaller in height and width then my originals.(I don't like them but they work.
If you put in only a few and leave another type,you'll notice the difference.
I'm really not sure what type you(I need)Closest to original..
http://www.happcontrols.com/pushbuttons/pushbuttons.htm
The originals in my Big Red 4 slot are wide ringed,the top push button stick up high and is wide(less ring then the buttons in my Big Red 2 Slot-the push button is wide and high,has a sharp lip ..Vertical Switch Type.
Closest to these

but mine are short)
http://www.happcontrols.com/pushbuttons/539200xx.htm
http://img.photobucket.com/albums/v21/Chris1/EbayVidJanShips009.jpg
These look like what I have in my Big Red 2 Slot(but again mine are short.
http://www.happcontrols.com/pushbuttons/5891xxl.htm
They are not original..,the push button is low profile and notas wide as the ones in my Big Red 4 slot.(Horizontal type switch)
I know the original owner changed all them,he told me.
The Buttons in my MVS Gold Cab are the Happ Buttons I bought off Ebay..
They must be these..New longer design,horizontal switch.
http://www.happcontrols.com/pushbuttons/5891xxl.htm
I hate them,they are very low profile,They feel like Crap when you push them/very soft..
I never changed them "because"..If you get one of these "repro CPOs you have to cut the holes to match the button.(I vut the cpo to the smaller OD pushbuttons)
If you cut the holes to match the original(wider) pushbuttons then these will float around in the whole you cut..Making for a pain in the ass to get it centered...
So,if you buy a Repro CPO,Make sure to have the button set you are going to use before you cut the holes..It's a one shot deal with these repro CPOs,you can't keep cutting on them or the top layer of clear plastic comes up,ruining the CPO.
...or even if you still use the original,a smaller OD pushbutton may not line up right and you'll see the circle line marks of the original buttons(if you had the wide originals)
There are two types of 2 slots..(One with on board Memory Card and one without)
For originality you need the the one with the onboard memory card reader.
If your not going original then might as well put in a 4 slot(two types) one small,one bigger-doesn't matter)
Or maybe a six slot,though I'm not sure if a 6 will fit..
PCB Comparison(the two type 2 slots nor 4 slots are not shown here though)
http://www.hardmvs.com/html/PCBcompare.htm