Cliff,

They seem to be all over the place - even Coughlin's sells one. Try out the cheapest one you can find. I've never owned a metal clad one - just plastic. They are not a bit spectacular, but they work just fine. Wife and I keep one in our kits as one of several alternatives for fire starting. Being able to re-fuel from the stove with just a few drops was handy on a couple of occasions for me. I carry an eyedropper in one of my sub-kits for various uses, one of which is to siphon off a little fuel from stove or fuel bottle.

P_L may have more info for you.

Tom