I took my 68 pump apart and put the E-bay seal kit in it. Here is a link to my pictures I posted on FABO. It's super simple to disassemble. After I got mine done, I heard that they used the same pump for years. Even a pump from a 90's LeBarron will work. Depending on the condition of yours, you might be able to find a good replacement really cheap compared to buying a rebuilt unit.

https://www.forabodiesonly.com/mopar/ams/convertible-top-pump-disassembly.157/