Check out these 3 threads:

"Diesel conversion?"
"Looking for info on the 2.5 Turbo Diesel"
"Japanese Pajero Diesel engines now available"

A bunch of us have been piecing together some info on swaps.

There are a lot of importers that can get 4D56 sets.
Jarco Inc. can get one for $2000+200 shipping.

thx
Scott