Can anyone id this RC car?

[Macca]

I picked this up at Beaulie Spring Autojumble on Sunday but I am not sure who makes it. It has a few spares packets with it that say Mainstream Scorcher but a Google search just brings nothing relevant.






So anyone seen one before or can point me in the direction of another one?

[purpletimbo]

http://osterode.zuio.de/xa_350726798...modellbau.html

Gives you a 1971 date, and the chance of finding the magazine at least?
Tim