Air Conditioning Re-Gas

[Rob Silver 76]

Just imported a 1976 C3.  It is standard and requires the A/C regas.  I'm reluctant to convert it from R12 to R134a.  Does anyone have any suggestions?
Can you still get R12 re-gas?
Is there another gas you can savely use other than R134a and the conversion required to use this?

[gtc]

R12 gas was banned from aircon and aerosols in the mid 90's.

As far as I know, R134a is the only legal replacement in Oz. It is a restricted refrigerant  and installers have to be licensed to use it.

[Panther]

old gas is mostley only now used at some hospitals, so you will have to convert, its not a big issue, just dosn't get quite as cold