You might be able to get a replacement remote from
http://www.replacementremotes.com but generally speaking, they're not cheap.
A much better option would be to buy a "One For All" or "Radio Shack" universal, as most of these support a concept called "advanced codes". Assuming that you find a built in setup code that works most of your VCR's functions, you can use advanced codes to program the missing functions.
Stear clear of the really cheap OFA remotes as most of these don't support advanced codes. The cheapest OFA remote you should look at is the URC-6011 (aka URC-6012) which sells for $15.
The good news is that RCA is such a common brand that all universals should have a code for it.
Rob
http://www.hifi-remote.com