Make your own out of an old pressure cap.  You can rip the guts out of an old cap so that you can just pump it up without the valving system causing a problem.  Voila! instant adapter.

Hope this helps,
Ken Wilford
John 3:16
www.vanagain.com

-------------- Original message --------------
From: Zoltan Kuthy <zolo@FOXINTERNET.NET>

> Hi List,
> I have a pump to pump up a normal radiator but I guess, I would need an adaptor
> to it to be able to pump up the Vanagon system. Anyone knows of one and where
> to get it?
> Zoltan