If you were in ontario, I have a 300 TD euro wagon i just picked up that I would consider selling to you(reasonably priced), but being in NB, there really is no options that I can help with.

Check craigslist, kijjiji, and buy/sell papers to see if anyone local has a MB, they could part with. you could always ditch the SLS in the rear, and just go with a standard system.

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1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D