Ah after some digging this script does exactly what i'm after.

With my setup and scene scale I have to export at a scale of 100.000 for the measurements between Blender and Moi to be 1:1 but the control is great.

https://github.com/TitusLVR/BMOI_Connector

If theres a way this can be added a feature to Moi officially that would be grand!

HI G, I'm glad you were able to get it resolved!

For reference for others who may be reading this in the future, it is possible to turn off the normalization in Max's ImportOBJ script by giving it a parameter value as described here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=6674.453

Also another way that you can bring in a mesh as a lighter reference is the OBJ23DMWireframe converter on the resources page here:
http://moi3d.com/wiki/Resources#Obj23dmWireframe_converter

That converter will convert the edges of a poly obj file into lines, it won't have as much bloat as converting a mesh into a solid made up of a zillion little trimmed planes will.

- Michael