Tungstenite is popular for moulding, die casting and even food processing applications. Great stuff if you can find a shop that does it. The compound is sprayed on @ high pressure and it bonds with the bare metal surface.
I hogged out a 2AA Clicky to 2x123 for Milkyspit a couple of years ago, the metal was so thin that I broke through while tightening the tube to the head. It is just as easy to machine a tube from scratch, but of course matching the anodizing afterwards is the real challenge.
GTA, West
Most of my lights are purchased from the US through CPF/eBay. I do visit Tetragon or RNicholls periodically, but the markup & taxes do make it more attractive to order goods from the U.S.
Mod supplies:
Tools (machining) - KBC Tools
Tools/supplies (electronics) - Active Electronics...