Sounds like a great program you have going.
I believe Ringside also offers wholsale programs as well, they are carrying more and more traditional martial arts equipment along with their boxing stuff.
Mats are expensive. I know there's a company called (I think) Reslite that sells both new and reconditioned wrestling mats, the reconditioned ones are supposed to be priced well. Sometimes they pop up on ebay, but shipping is what will probably be pricy.
If you're near the KC, MO area I might be able to put you in touch with some people. There's going to be a Miletich Fighting Systems affiliate gym opening in KC. I'm not sure who's going to be running it yet, but I would definitely check that out if it's within a reasonable distance.
IM sent on the training tapes, I might have some you may be interested in.