Thanks for the replies.
I called kirbans and the lady said $179.95, but that i should email dennis kirban on the other 3 you mentioned.
So I just emailed dennis kirban, and waiting to hear back from him.
He wrote me back and said he had ones 10% of spec for 100.00
or 25% for 55.00. Im not sure what that means , im guess one is crappier than the other . Has anyone used a 25% one? Or should i pop for the 100.00 dollar one?
Go for the more $100.00 ones. They are within 10% of new pressure, been tested and come with a bit of a warranty. I bought a few of these from him as spares.