I did this when I first got my Westy. Went to Walmart and bought a gas
grill regulator and hose combo. I went with the dual hose model and also
picked up a steak saver fitting in the camping dept to attach the 1#
bottle to the regulator. The hose's are a direct fit to the Westy proane
fittings 3/8" behind the fridge at the top.
http://images.thesamba.com/vw/gallery/pix/521715.jpg