I’m new to this platform and it seems to me there aren’t that many orings to replace.
Just degas the tank, remove the valve and replace the orings.
Talontunes has an oring kit, though maybe someone will chime in with oring sizes that you could just order.
There is not much traffic here, but if you take the time and not just do a search, there is 10years of knowledge on these guns here.
I’ll PM a could of the knowledgeable AF guys over on GTA and see what I can get for you.
Tony himself has answered every question I have posted here, and he may chime in here.