Quoted from tjc02002:

To answer your questions: right now there are a few places to buy hardware. The cheapest way is to buy led panels off aliexpress, a shield from rappelbox or uncle sash(or get your own made). And an stm32 discovery board from say mouser(I also think rappelbox and uncle sash can sell you this stuff). Oh, you need to either make or buy a bracket too which those guys sell(I made mine). Also you need some way to supply 5v ~5amps or less of power. I did this with a $4 voltage regulator off eBay and hooked it up the same way colorDMD does it(snag 12v off open driver board connector). A more expensive yet also more elegant solution is buy the stuff from pinballsp. His boards integrate all of the hardware into one board including the bracket to mount in a real pinball.
As far as games that are "colorized": There are really only a few newer stern games done well. This project is an open source community based project and to be honest it's pretty young. It's up to users like you and me to spend time colorizing games and posting the files up for all to use. There is an editor program that has come a long way to accomplish the color data and you can also use pinball browser for newer stern games. It's much easier to color newer stern games because they already have more shades to work with before you have to start actually drawing in your own colors for each frame.
Needless to say if your even remotely interested in this go to the vpuniverse forums and there is a specific pin2dmd forum with all of this information and more. Also check out Pin2dmd.com for the basics.
Pin2dmd is a diy open source project and is very fun IMO. I built 2 of them so far and they cost me about $140 each(actually a little less). I needed a dmd anyway and figured I could get a used regular dmd for about the same as this. Hopefully someday people like you and me will upload decent color renderings of many titles for all to share
What's pretty promising about Pin2dmd is that it is geared toward virtual pinball and all the development applies to virtual or real pinball machines. This gives me hope that many VP users will work to color games in the future.
Hope this helps,
-Tom