I've looked closely at the CR body and compared it to the ones I saw in the US and I'm about convinced it's been taken from an Everet Morrison. The internal tub is identicle and on his earlier bodies still had the boss for the accelerator pedal linkage molded into the passengers side foot box.
Have a look at these EM pics and see if you can pick it.
check out the bonet lock sections on this pic:
Have a look at those front and rear wheel arch flares on this pic:
Check out the lack of a door sill, shape of the tunnel and the door pockets in this pic:
There are a lot of other details as well that make me think the bodys original was an EM.
Cheers