Jydorii

Hi, I bought a 1976 Mack dm685 truck from the USA last year, I live in nigeria and I have a problem getting parts for my truck, I need the pinion that's within the axle, only problem is the part is extremely scarce here and the few people that have it will once sell the entire axle, which is too expensive, I won't mind buying one from the USA and shipping it back to Nigeria. If anyone has info on how or where I can get this parts ( pinion) i'd really appreciate it.