I ordered:

Item No.              = 3002B
Product               = Tap & Adapter Fitting w/hose
Options               = For R-12 Systems
Price                 = 21.95
Qty.                  = 1
Total Price           = 21.95

Item No.              = 3000individual
Product               = RedTek 12a
Options               =
Price                 = 10.95
Qty.                  = 3
Total Price           = 32.85

Item No.              = 3003individual
Product               = LeakStop - Can
Options               =
Price                 = 11.95
Qty.                  = 1
Total Price           = 11.95

from   www.wekeepucool.com/

The package arrived in three days.  My Vanagon doesn't have AC, I bought this stuff for an '85 MB 300D.  The AC on this car had slowly faded away until this spring it was gone.  I had planned to buy some R-12 the next time I went to Mexico, but decided to give the Red Tek a try.
        Mercedes is considerate - the low pressure valve is about the most easily accessible thing under the hood.   I tapped the Leak Stop, put it in first, then left the AC running for 15 minutes as per the instructions on the can.  Then I put in the first can of refrigerant.  There was cold coming out of the vents.  I put the second can in and there was very, very cold air coming out.
        That was two weeks ago.  I drove down to Socorro yesterday.  Outside temp 100 degrees.  After ten minutes or so on the highway I turned the AC control down to halfway. fan on low and was cool all the way.
        The Red Tek can says the refrigerant has a pine scent added.  It didn't smell like any pine tree I ever met but it was distinctive.
        The folks at wekeepucool carry the kit that contains the hose, a can of leak stop and 2 cans of Red Tek for $55 + shipping.  It isn't on the website but they have it.

Joe/Albuquerque