[Kurt in NJ]

Very interesting, I would try O-rings, it looks like the thickness is important, there seems to be seals on 2 jets by the GAV boss --not having leakage there could be important.

If you know someone that rebuilds auto transmissions see if they have a "leftover o-ring/seal box", that would have many choices , plumbing supply stores usually have good assortments, also hydraulic hose--jack repair places.