Yes the black ones are easy but the pink/yellow ones (I am pretty sure made of silicone) are not as easy to find. With over 200 to do .30 ea is to much for a part that I have seen similar items go for 3.00-6.00 for a 250 count on the net. If I new for sure what it was I could order cheap ones. Do you think using black ones would work? I figure they use softer ones for a reason. On the bigger original valves they use black ones (EDPM). I e-mailed Edstrom but I doubt they will tell me.

Ryan