Have you looked at a modified Bosch EDC15 ECU?
https://www.blacksmokeracing.com/product/mercedes-turbodiesel-race-parts/engine-management/mercedes-diesel-street-ecu/

Dieselpump UK makes a manual transmission adapter kit:
https://www.dieselpumpuk.com/shop/clutches/om613-om648-manual-gearbox-adapter-kit/

I just bought a 37DZ transmission on ebay UK last week.

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Old Blue - 83 240D 6 speed manual trans, OM648
Green Machine - 2001 Europa G500
87 300SDL Bought on Peachparts. Low-ish miles..?

Family Truckster - 2012 VW Touareg TDI

Patchouli Wagon - 2004 E500 - SOLD
333k mile 97 BMW 750il V12. - SOLD
The Californian - 85 300TD - SOLD
Daily Super Sedan - 03 Audi S8 -SOLD