Using Arduino to program Amtel AVRs via ICSP header
It sounds like you've already got an AVR ISP programmer and you're just looking for something to go from that to the AVR.  Adding the ICSP header to your project is easy, but if you don't want to do that, I'd suggest checking out the Simple AtmegaXX8 Mini Dev kit.  I'd get the version with the ZIF socket included - it's much easier to work with than a traditional socket.

Alternatively, you can wire your own up on a piece of protoboard pretty easily, though again I'd suggest getting a ZIF socket.  Sparkfun has the cheapest ZIF sockets.  You'll probably also want to add a crystal (Sparkfun) since the ICSP won't work without one if you've set the fuse bits to expect an external crystal (so having one means it will always work).