I have a 1995 Cummins 12 valve, automatic 47rh. I recently lost the PCM in it and now I cannot find out which one to buy to replace it. The parts stores have 4 PCM's that all have different part numbers and don't know which to buy

The PCM is supposed to be numbered but the sticker fell off, and I replaced the cab of the truck with a gasser so the PIN numbers don't match up.

here is the link to the different choices: Engine Control Computer | 1995 Dodge RAM 2500 3/4 ton 4WD 6 Cylinders C 5.9L Turbo Diesel | AutoZone.com

Can anyone help me to figure out how to fix this???