Heard you can still find R 12 in Mexico, but I have no proof that it is still for sale there. I have my own personnal stash of R 12, and it blows cold, 32 degrees in a Sears a/c unit under the dash of that 66 F250 I've had for years, all that other crap, Red Tec, and whatever the other crap was called didn't blow cold, just cool at best, then one of my customers brought in a thirty pound can with a little freon used already, and gave it to me in payment for a little touch up. The local pick a parts yards did have used R 12 for sale, they have to evac every a/c unit and drain every engine, trans, and rearend, they even vacuum out the power steering and brake units, as all gases and fluids must be recovered prior to scrapping them out.