I posted this on the other forum too and got some responses from people. Here is a list of ones I had before and the additions from others so far.
http://shop.wheelflip.com/
http://www.amcrimhalves.com/Rim-Halves/
http://www.tunershop.com/Wheel_accessories/
https://www.gmpperformance.com/index...tList&cid=6235
http://www.forgetechusa.com/
http://www.americanrim.com/products_01.html
http://www.vrwheels.com/index.php?ma...382133c4fb37ee
http://www.titanium-touch.de/titaniu...h_index_uk.htm
http://ewheelworks.us/shop/
http://shop.ccwheel.com/
So far, AMC Rim Halves looks like the best deal, at approx. $800 for a full set of lips and barrels in the sizes I'm looking for, but they won't answer the phone so I can talk to them to get more info. Ewheelworks and WheelFlip get the same parts as far as I can tell, but I've heard about issues people have had with WheelFlip taking forever to get the parts, etc. Ewheelworks quoted me around $1400 for a full set of lips and barrels, which is more than AMC obviously, but at least they got back to me. The rest are either quite a bit more expensive, they sell a different type of lip and barrel (so I'll be limited to buy from them in the future), or I haven't gotten ahold of them yet to get prices and/or assembly dimensions.
At the bottom of this article is a list of wheel companies...
Multi-Piece Wheels | EURO ALLIANCE
This thread has a plethora of wheel companies listed...
little known forged wheel companies
Here is the link on the other forum if anyone wants more info...
http://www.rx7club.com/suspension-wh...parts-1076067/