Hey PetePilot, you missed a . after the www- here's a direct link to to an International 4000 on his website... is this what you were talking about?
http://modelsbydave.com/images/products/international_4000.jpg
He mentions in the description that it will fit on most kit chasis... do you by any chance know what base kit he is refering to?
I'll second the motion- I think that kit is your best bet for an ultimate SWAT/SRT vehicle. I run EMS for my university and we work with the University Police freqently and share the same building- their Special Responce Unit has an ambulance (F450 maybe?). They just switched the red lights for blue, painted it up in a State Trooper silver and blue and added their own decals and that's it. I think if you converted that truck to basically have a big armored box on it, add some plating to the doors/windows that'd be very cool