I have infrared set up in the BatComputer to work with my Canon BJC80 IRDA Printer. Found a guy selling the complete IRDA units with cable on EBAY. It was listed as " irDA Infrared module kit +5.25" or 3.5" frame". Got it for $19.99. Has a real nicely done module attached to the frame. Attaches to frame with two standard computer screws. Could very easily be removed and mounted whereever you wanted. Cable that came with mine is like 36" long. He has two versions of the cable, one is FIR, other is standard.
Hope this helps,