Rear door should be the same as a defender, this one has had a patch pop riveted to it where a spare wheel carrier has been bolted to it.
It also has a different type of inside handle, I think the catch may be the same so should fit.
I would split but you might find a 'proper' defender one for the same sort of money.
Feel free to come and take a look, I am in Edinburgh, pm me for address.