Whats wrong with the TD?
I have TD in me 90 and she is a beaut, smokes a bit, and uses a bit of oil.
but the previous owner rebuilt it for, well the receipts say 800 quid odd.
The only time it has failed me is when I had a naff battery, O h and the winter killed the glow plugs. It takes at least 30 seconds on the plugs to start. But start it does in that hard winter, every day for work.
The TD aint that bad an engine.
But I do have a disco 200tdi to drop in.....soon.....honest

What i am saying is you could pick up a TD engine for fek all and get it and get it re conned and have a good reliable engine.
Just a thought