It would probably be cheaper to purchase a used machine. I don't know about the video slots, I have the real japanese ones (three stop buttons). I was given three, mostly as salvage electronic parts. Two were complete, best I could tell. Managed to get one fully functional, and accepting quarters (doesn't reject much of anything though). They run just under $200, and shipping is another $70. I had to do a lot of searching for repair and owner's manuals. The other one that appears complete, blew the fuse, spectacularly, and haven't plugged it in since, or even messed with it. I really hate getting shocked...
The japanese machine are required to be replaced every 2 years, so there are tons of them. Search Ebay and you should find something. I'd image broken ones or loose parts could be had quite cheaply, and you'd have the coin acceptor and pay-out mechanisms.
The novelty wheres off quickly though. I've only played it twice in the past 6 months, both times just to show off to curious visitors. I've never been much for gambling, so perhaps its different for others.