If your a fairly competent person there is a test you can take online to be able to purchase R-12. Pep Boys sells R-12 usually keep it in a locked cabinet, keep in mind these containers are old. You will need R-12 fittings and gauges which are a different size than r-134. The investment in the...
Just want to through this out there, you can still get R-12 from Pep boys, but you have to ask for it. All you need is an easily online obtainable MVAC Technician Certification. I got lucky with my 88 Mustang somebody chopped the harness I wired it back up, charged it and no leaks.