Cosmo, trade someone like mad for it in devon , just look in the back of the mags!, usually cost about £500 for a decentish one with logobook which is all you really need i believe.

Ok you will get an xr shell cheaper but when it is all rebuilt and mint it isn't going to be worth much as it isn't an original, it's a look alike and you'll be lucky to top £2K so lash the extra cash out now and reap the rewards when you sell it.

Some breaker may even keep service histories that come wth the cars they break for parts so may get it with the shell, it wont really apply as the car is rebuilt from a shell but people buying these cars want as much history as possible, it's just the way it is, and take as many photos os the rebuild as possible, all helps.

Good luck with the build and keep us updated.