Hi Colin
Sorry, I didn't realise that you had already been in contact with AA, I can't believe that they will no longer be providing any support for the pro target especially when you consider how many times the regulator seals go. I also own a pro target which once again is in need of new seals so I would be very interested to see how you get on with sourcing the new oil rings. Can you give me further info on the tool you are going to use to disassemble the reg as I would love to service this unit myself especially as air arms are now sticking their figures up to all existing pro target owners..not good!
All the best
Dave