If it’s just leaking and the hard parts aren’t worn excessively, buy this seal kit:
Edelmann 9157
https://www.rockauto.com/en/moreinfo.php?pk=3860271&pt=7397
Part number is 5083664AA. It’s discontinued. If the hose is soft, replace it with 3/16 fuel hose.
https://www.retromotioninnovations.com/products/sidewinder
I’m looking for an outside door release handle retainer. Does anyone have an old broken handle that I could get one of the retainers off of? See picture.