I'm thinking that getting the engine to fit would be a relatively minor problem compared to getting all the electronics necessary to run the engine wired into your car. I'd be more inclined to buy one of those 616 Turbo's from Force Motors in India if I wanted to put a new diesel in there. Of course it all depends on the emission and registration requirements in your locale.
If you're really intent on getting a CDI in there, buy a wrecked Sprinter van and transplant everything. I've seen a Sprinter engine on Ebay in the past.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13