Try posting in the IR subforum.
IR photography is still not common, and understandably, there wouldn't be many IR modified DSLRs around. Even if there are, they may not be focus calibrated for IR.
Just to let you know, over the past 3 weeks, I have modified 4 Nikon DSLRs for IR, a D50, a D70, and two D1X. The company I work for is an authorised Nikon and Canon repair center, and we have the hardware and software to calibrate the cameras to focus correctly for IR.