In a word... NLA.  You'll have to settle for the Marshall 290 IIRC.
About $30 at your local propane supplier.

Jim

On Monday, January 19, 2004, at 10:57 AM, Rabble wrote:

> Does anyone know of a place to get one of the square types of propane
> tank regulators, i.e. like the original one on my '85 vanagon westy? I
> want to replace my leaky one with one in which the original plastic
> cover will still work.