Mark,

R-409 is totally compatable with R-12.
Uses the exact same pressures, and blows just as cold.
But, again, it only comes in 30lb. bottles, so the initial cost is about
$200.00

I know that Granger has it, and for sure it is about $225.00 per 30.

You also have to have an AC license to buy it.

Later,

            ______________
           |[  ] [  ] [ ]\
           |    |    |    |
     ~~~ ~||-(())----(())-|

Terry--
74 Campmobile- (Clementine)
85 GL- (Delilah)
86 BMW 325 ES- (Eva)