don't think so. i've been looking at an ebay auction that said that the overlay was for a 6 slot cab only and that it would not fit a 4 slot.
thinking about getting one myself, but what's more important to me is the quality, since many on ebay are said to be crap.
Nope. The 6 slot is much wider. BTW, don't bother with the cheap reproduction overlays either. Make sure you get an NOS one that is made of the plastic lexan/plexi-glass material. I've seen quite of few reproductions on eBay that are advertised as "NEW". Very misleading since it is new but not original NOS (new old stock) new.
I don't think it's actually plexi-glass but I wasn't sure of the actual name of the stuff. As for printing on a similar type material, you'll need to have the right equipment to reverse print on the backside. Some print shops can do it but I'm guessing it will cost a fortune to do.