Try asking on this forum

[Link: avsforum.com]

dedicated to that series of Denon receivers. That's a 2002 model, so I wouldn't spend a lot of money to replace the missing remote.

I think you can explore some pretty inexpensive alternatives to the RC-884, as the remotes seem to be pretty much interchangeable.

If you're already in the market for a universal remote, you might want to go that route instead.