You should be able to use most One For All (and certain Radio Shack) remotes to work this as it appears that the 4000 series of GoVideo VCRs respond to the Samsung VCR code. The code that's in most remotes is VCR/0240, which should work, but even better codes are VCR/0432 and VCR/0643. Certain buttons will need to be re-programmed using advanced codes, such as the arrow buttons, but that's no biggie.
If you can't find a remote locally, I can sell you a One For All URC-8811 for $19 plus $4 shipping, and I can even load in the exact code that you need.
Rob
http://www.hifi-remote.com