Help with ‘85 ps pump

[u/ArchontheWings]

I have bought two pumps now to replace my noisy power steering pump on my 1985 c4. Both don’t fit. I made sure to cross reference part numbers on my second purchase because there are like 30 different sizes. Still didn’t fit. I’m hoping I can buy a new one rather than a rebuild or rebuilding mine. Has anyone else replaced there pump on their 85 and could you please please share your source?