Re:
Yep, as above. I remember a few years back there were some proto 5's out there. One was light weight, the other a beefed up version. The tough one became the Alpine 160, the light weight one didn't make production although some of the tech did.
Don't know if I'd buy one as people always seem to want a premium for what is in effect a design not deemed good enough for production or a design close to/the same as any other.