Someone mention Flame Plugs?
I did indeed run mine from a tank, but it suffered noticeably from the lack of pressure. It was still very effective, mind.
I think, like me, Chug has a chassis/cab, and as far as I can tell, there is nowhere handy to mount the tank.
I had a bit of a cast around looking for a pump a while back, and didn't really come up with much.
Best thing I could think of was a facet pump, with an adjustable bypass, to regulate the flow and pressure.
I should really get and do it it over Xmas. Doesn't look like this winter is going to be too bad, but I've already had to have one runstart coz the batterys went flat. Would never have happened with a flame plug.