Glenn,
There are several really good acrylic suppliers around the US.
My personal favorite is the Zeit Company in Salt Lake City, UT. Their phone number is (801) 972-8210. Ask for Josh Beckstead.
In my opinion, this is one of the absolute BEST companies to deal with.
If Zeit can't do what you need, you might also try J-Bob's in Ft. Worth, TX. Their phone number is (877) 284-5262. These are also wonderful people.
This is a huge project! What are you having made?
Cody |