if the xr is straight, why not do a transplant. better the devil you know.........
i looked at plenty that were more than 1800 quid and they were nice cars but i had people saying a minter was a car with only several bits of welding done.........
1800 will not get you a car without rust or a car that hasnt had rust problems. you may find a mint one where the owner doesnt know what its worth and thinks its just an old escort but theyll be few and far between.
im sorry to be negative but there is too much crap around now. too many people thinking that the RS badge means the car is invincible, its NOT!
but good luck none-the-less, i hope you find a good one.