The valve that charges the AC is shot on her car.
It's the hard line (aluminum line that has the charge shrader valve that i think goes into the AC condensor)

does anyone have a part number for this, or know if it's available at the dealer?
it leaks from there. the rubber seal is all puffed out too
i tried repacing that inner part, but same issue, so something might be bad with that line in that valve.

just wondering if i can order that new, or if someone has a nice clean used one they want to get rid of.

 

This might help you score a used one. I know a guy that may still be parting out a '90 Formula.

Ebay seller ID is Kristil919

 

i have the part you need. you can see a pic in parts for sale. thread name: a/c system parts from 91 formula. $20 shipped.

 

sent you a PM
the first photo you show has the line i need
i think that is called the evaporator line? it's the high side