You can still get R12 it is just expensive and you need a EPA 609 Certificate to even get near it. Their should be a retrofit kit out there somewhere, did you try the autozone? Also try some online auto a/c suppliers.My grandpa's ram is blowing warm air when the a/c is on. He wants to convert it over to the 134a but every converter kit we have tried will not fit. How do I convert this over since the R12 is not made anymore?