Worldspan,
Do you just need to add R12? Or, what is the problem with your a/c?
Not sure where to locally get R12 these days. If you can find some locally and the ask for your "license", let me know. I have my EPA and ASE certification cards that we can use. If I can find my gauges, I can probably help you add some.
also, Freeze12 might be another alternative to R12. I hear it does not work as good though...
One more thing, I will be in Laredo this weekend visiting family... I have a buddy who "brings" r12 cans back from Mexico. I'll check with him to see if he's got some and how much he wants per can...
Luis