thanks for the info and link! This was a "shorty". I just posted 1 about my fuel door actuator, that's what was leaking. That's a unique piece, I think. Not sure how the diaphragms are set up for it. It doesn't come apart and has some internal passages or something. It was failing in the unlock position, but wasn't causing any issues with any other part of the locking system. I attempted a repair, but it was short lived. It's designed to fail "open", i guess, which makes sense so you can get to your fuel filler neck.
Found a used one, put it in, and everything is working "as advertised" now.