Following the link you provided reveals that the DEFI HUD has not been produced since 2007. Good luck finding one.
And, even if you do, from those pictures the display looks even more "canned" than the Corvette HUD. Getting it to display RADAR information (or any other information that it was not originally designed to display) could be an exercise in futility.
Update: the HUD One now works with Car PCs too, thanks to a new plug-in for RideRunner:
Question PICO projector for HUD http://www.microvision.com/vehicle_d..._displays.html + Carputer + "radar - laser" dector + NAV + ?? can you help program the system? I am working on a 1973 Lamborghini we have ZERO electronics in it now an a fresh slate to design a dash. My "goal" is a dual display + hud one display for audio - air con - phone - inernet - nav - warnings like tire pressure ect ect (like my 2011 Jag XJ) and one screen for gauges / motor data.