After sending several e-mails to CP through their website without getting any replies, I ended up giving them a call. Talked to Randy and he said he would ship me some burst discs if I sent him an e-mail with my address etc. That I did, and haven't received any reply to the e-mail I sent. This was almost two weeks ago. If the discs are in the mail and just haven't gotten here yet I will come back here and post up, but for now I am not so happy with the customer service.
On another note. Does anyone have any tips on how to change the lock ring to match the piston when switching from HP to LP, or vice versa? When I remove the reg top, the lock ring will be stuck on the reg top threads. How do you get it off?