We do not provide this proprietary tool for sale. If your knife ever has an issue, it is always recommended to send it in to be serviced by one of our technicians. Our warranty service is put in place so that our customers like yourself do not have to worry about replacing springs, damaged internals, or diagnosing issues. If you would like to send your knife in for warranty, fill out the new support ticket form in our portal here: http://support.microtechknives.com/support/tickets/new.
Some of our bigger dealers (such as PVK Vegas) do sell aftermarket tools and screwdrivers for our knives.