Eaglescout and all: I'm still on the case. I've found some new sites for stash tins that may be the correct size. Still checking it out. I've also got an email in to SASS.

While looking, I found this non-tin kit from BCB.

http://www.bcbin.com/store/cat_out_adv.asp?idproduct=127&idCategory=32

It's called the Survival System kit, if you can't use that URL. On another site it was described more fully, and seems to include shelter components.

I like the idea a pouch like this for a PSK, as it seems to make better use of the shape of the trouser pocket.