Like DR1665, I evacuated the R-12..pulled a vacuum & put in 80% of the R-12 charge.My Raider A/C has been operating normally for 3 years now. My guess is that your seals failed for some other reason. I suggest replacing the seals w/ whatever is available at the parts store or dealer ; pull a vacuum & recharge. Run it & see what happens. you won't be out of but $60..My 2 cents.

Va_Stumpy
89 Raider
"Never judge horsepower by exhaust"
3.0
automatic
stock as a rock
Dual Bouncy Seats