I'm also looking for a remote control for the Kenwood VR-505 receiver: The remote is labelled RC-R0511, and according to Google, its part number is A70-1468-25 for those who are still looking.
The original remote was unavailable at all three of the internet stores I looked at, but both remotes [dot] com and net (related? had brand-new replacement remotes that had been constructed and programmed
.