Don't think Denis is around the net anymore. I haven't been able to get up with him in a long time. I was one of the very first to order the SGB tool, in fact Denis had my money for over a year before I ever got it. He would send me an email about every 30 days or so asking it I wanted my money back, I'd tell him if he was still planing on building the tool to keep the money and send it when it was ready. I have it and use it more than the tool that Paco makes which is also a very good tool for your .22lr box. The easiest way to get one of these is to find an old piece of .22lr barrel stock and have a machinist modify it so you can use it as an SGB tool.
I have seen another site that has these tools on it. Can't remember what they are called but it is the same thing. I'll look in my old stuff, if I find it I'll post the url.