Thanks, been in touch with John Green and a guy over in the UK. Between these two guys I should be able to source anything for it.
I have an option to buy an OM636 out of an old neglected 1960 Merc truck down south. Just feel bad for splitting a matching numbers truck and engine. I'll have a think about it.
Wooden floors not bad hey. Tas Oak of course.
Had a play with the Merc yeserday. Up on stands, wheels off, sorted some spiders, swept the floor, organised the loose parts, removed some panels to bring home and play with (wash n polish). Will bring the wheels home next weekend when my old trailer is ready (re-wiring it).