Well, here is the write up:

 Extend-A-Flow Propane Kit, Connects small, portable appliances normally
fueled by disposable LP gas cylinders to the existing LP gas fuel supply
w/o interrupting the suply of regulated fuel.  No need to buy extra LP gas
cylinder or several disposable cylinders.  Kit includes a listed brass tee
fitting and a 12' flexible hose.

cat. # 66-8812 (1997 catalogue) $43.89

Tom Raper RV catalogue is 1-800-727-3778

I got mine when I visited so it was free.  It says $4.95 on the cover but
I'd say if you into camping and setting up your VW for it it is worth it.

Anyone give me any more info on getting my propane tank re-certified? Is it
hard?  I mean, mine is REALLy crusty but I have sanded it down a good bit -
still looks pitty though.  How do they check it, is there a visual
component or is it just some sort of pressure thing?

Regards,
Eric Pickering