If you're referring to the valve lubricant, try 800-733-6107. Netherland Rubber Company in Ohio. I've never used them, but I found them using an Internet search. The company link is
www.netherlandrubber.com/adhesive/compound/compound2.html
Hopefully they're still around and have it in stock.
FYI, I used "Copernic" to find them. It's an Internet search program that simultaneously performs multiple searches. Highly recommended.
Drew
92 C2