No, I'm sorry I don't call people I don't know. I have been here 10 years and I've never called anyone. It is just a personal preference. I'm not sure what has you confused???
1. There were two different rear ends used in Pinto's.
2. One type was the 6-3/4" which sounds like what you describe. There is a removable rear cover.
3. The other type is the 8", it has a smooth rounded cover that is not removable and the gears are accessed by a section removable from the front.
4. There are no specific Pinto parts dealers like there might be for a Mustang or Camaro. There are a few individuals that sell parts they have acquired.
5. It is likely a difficulty to find someone selling just the axle or spider gear.
6. You would probably more easily find someone selling a whole 6-3/4" rear end but that is a heavy item and costly to ship.
I will post this here, and if still applicable on the post that Dwayne unlocked and moved.