I got lucky and stumbled on my fuel-burning heater on eBay a few years ago. I needed to fabricate an exhaust pipe and the fuel line, but I found the compatible fuel line quick-disconnect fitting to match the one on the exterior of the shelter at McMaster-Carr. I might have needed to replace a missing power connector, and I think I found a matching one at Mouser Electronics.
I didn't have the proper fuel can adapter at the time, so I fabricated one out of brass and various fittings. Total over-kill!
Pictures attached below.
My heater's spark plug developed a crack in the porcelain and couldn't ignite any more. I ordered a rod of machinable ceramic from McMaster-Carr and turned a new insulator on my lathe. The metal parts of the spark plug could be removed and re-used. I haven't gotten around to installing the home-made spark plug and testing it yet. Hmm, I don't seem to have pictures of it handy on my computer right now.
I don't think that I have spares of the cables that you need. I'm still looking for at least one cable, too.