I found something on the forums about Denon Performance, but can't find any contact info.

Denon Performance Products Inc:
PoBox 134, Port Coquitlam, BC, Canada
(604) 464 4401
Secret tol free number 1-888-468-0688,
fax (604) 944 1670

US address: 1160 Yew Ave, Blaine, WA 98230.

NOTE: Ron Johnsen, former owner of RPI, started this company shortly after his former company was bought. Wholesale direct prices, so they claim

Or you could try RPI<ul><li><a href="http://www.rpiequipped.com/">http://www.rpiequipped.com/</a></li></ul>

I found that same info just a few minutes prior to seeing your post....but it took a little hunting.

and they have pretty good price, too.
where r u located?
and what are you planning to get from them?