You might be able to put one together yourself that's more catered to your own needs. Just buy one of the Vic Swiss Champ leather belt pouches and then take a look on the SAK wiki at what comes in the original SOS kit. They are mainly ubiquitous items (except for the crazy ruler contraption thing, and maybe the comb) that one can find at any Boots chemist. Then you just stick all those components into the leather belt pouch and voila, instant SOS kit.