Check out these guys:
www.highspots.comThey occasionally have for sale good deals on commercial vids
(WWE & TNA).But their library of Japanese, Mexican, indy, etc. footage is vast and reasonably priced.
If it's good matches you're after especially, check out the NJPW & AJPW sections.
You can even view some footage on Youtube, and anything you like you can search for it on Highspots' site.
IOW if you like Sean Waltman's matches, you can search for the "Best of X-Pac" DVD
(good luck).