Frank & Marc,
Here are the compressor photos I have at hand. Will continue looking for others, but the following are the sum total right now. If you have any specific questions, post them here. If I don't know the answer, someone will!
The pump should look like this one, and simply bolts onto side of the gearbox by removing a blanking plate.
You use the same bolts which came off, and should only have to make a gasket. Oil for lubrication is shared with the gearbox. You will see in the closeup of the compressor crank, I was missing a bush between connecting rod and crank. If I remember correctly. I got one from my local bearing shop, and had to ream the inside to fit correctly.
Let me /us know if you need specific photo of anything in particular.