What you have set up is the same as a LHD disco/defender conversion, is that turbo from a 19J?
What exactly did you buy for your 600 notes? An engine with what exactly?
Defender 200Tdi manifolds are quite rare and can be anything from £70 to £200 for a second hand one, but i see them more to the £200 mark when i have the money ( typical ) which is why peeps use the 19J versions with abit of work ( adjusments to the brackets and new clamping plate to hold it on )
if you now get a 200Tdi Disco turbo, you're gonna have to adjust that to get it to fit the 19J manifold, again it's possible to do but involves abit of work.
Search for a 200Tdi Disco Manifold & turbo together and stick that on. I would like to suggest you just get a turbo and work on getting it to fit the 19J manifold, but i don't think you're that was inclined tbh.