after reading your posting, I became a bit curious. A few years ago, I also thought about buying one of his Kilo kits.
When googling for RPM Modeltech, I found a whole new website. It has very little content (yet?) No sign of the hydrofoil he was working on at the time. No sign of a Kilo kit either, except from a photograph (in the background of the home page), which was also used in the old website. in fact, just a few submarine kits and a T-rex kit can be found.
Also, the "about us" section is "under construction". But there is also a section "contact us". which does seem to work.
Hope this helps,