First off, this is the custom forum so stock parts don't belong in here and you should post it in the CPFmarketplace instead. Secondly, there are a lot of vendors who still have these in stock, oveready or opticsplanet for example. If you want a modified tailcap that does the same job but better, try a Z41 with a McClicky with a Delrin shroud. You can even contact Surefire through the warranty department for one of these.