Drilled the 2 rivets, took it apart and was able to clean it up, un-jam it, and oil it. Luckily it was a simple fix. Then I realized the other side is also stuck on the other reel. Had to take that one apart too and after cleaning/oil it was still jamming. Found one of the springs was in the wrong place and now both are working. I just need to get new rivets.
In the future, I'm going to be more careful on buying parts back east in the rust belt. Some rust on the seat belt loops that go in the rear pillars and the middle male part of the buckle is also rusted.