Yeah, I'm looking for a cheap preamp, myself. I'll probably be getting a Musical Fidelity X-CAN v8p until I can get the Conrad-Johnson of my dreams. They also had a small form factor pre with multiple inputs, whose name I cannot remember.
Used, I'd look into just about anything from the Musical Fidelity lines: A3.2, A308, A5, Nu-Vista, etc. The A3^CR is very good (I owned it for a while), but the A3.2 is supposed to be just a tiny bit better. I'd also look into used Conrad-Johnsons.