Yeah, you should really contact Vektorlogic. They have created their own MVS boards, cart casings, etc. You could probably get your cart to the masses rapidly through them as they already have everything in place.
The thing with using SNK boards is that all it will take is one little letter from SNK and it will put a grinding halt on their distribution plan. Sure, they could cast the letter aside and ignore SNK, but even the slightest court filings could mount up and put a strain on an inde development team.
The key here is that in order to make a commerical release, you can not use SNK proprietary parts (their boards and casings). You mush have your own. Check into the Atari -vs- Nintendo suit. Vektorlogic can release games because they developed their own boards, casings, and packaging, PLUS, their MVS boards offer a form of copy protection, so you would thwart some of these ROMZ talkers.
Jeff