I tried to buy the tools from someone in Germany two or three years back, might have been Olav, but although he replied once (so I know the email addresses were correct) he never responded to my purchase request. I re-sent it twice with no response, so then I gave up. Maybe I'll try him again.
A related question. Last year I had my Stinger battery replaced by a dealer in the UK, and got it back too late to dive with it there. When I got back here to Belize I found that it no longer autostarts, but I have to go through the menus once I'm in the water and before I descend. I often forget, and have learned that if you turn it on in dive mode after you've started descending that is the depth which it then regards as the surface.
When you replace the battery yourself, how can you ensure that it will autostart correctly?