| Why not buy an old halogen/lead acid cannister lamp like a Pro 14? They come up for sale frequently and are usually piss cheap (compared to what they were new). Remove the cable gland and plug it with a suitably sized bolt with an o-ring. I'm looking at my old AUL torch right now (sorry, no measuring tape) and the ID looks big enough. They've gone well past 500ft.
Or try Curt at dpvrepair.com, he bought out the AUL stock when they closed and may have some old cannisters going cheap.
__________________ "I hate to advocate drugs, alcohol, violence or insanity to anyone, but they've always worked for me" Hunter S Thompson http://www.snp.org |