I have a used URD MAF Calibrator up for sale. This is Model Number PSC1-003 It's used, but in perfect working order. It's currently loaded with a map from Gadget for a V6 with cat-back exhaust and aftermarket filter, but you'd probably want to have a custom map made to get every last hp out of your specific truck! I don't have the cable or CD, but you can download the software at the following link.
Since I'm selling without a cable, I'll let it go for $160tyd.
Please let me know if you have any questions.