88 5kq - slow leak in A/C, need gasket/O-ring sources

[S. Jaworski]

patient is 88 5kq

A/C works OK when charged up.
I have a slow leak in the plumbing . . .you can see the oil stain. Takes
about 2 months or so to leak down until you dont feel the cooling anymore.

Anyone have a source and pricing for an O ring/gasket set for this car?

Any BTDT regarding the replacing procedure?

Anyone have a source for Freon? I had it charged up with that Auto Frost
stuff last time. Seemed to cool ok.

Syl
88 5kq
90 100q