When visiting the metstrade last week in Amsterdam i came by the new v 12 diesel of diemax engineering.
i have seen a early version of it last year but after building one out of existing BMW components they now have stepped up and start on the drawing board and designed a new billet engine block whit all components on the place they want and Also have there own ecm and software build for it so About everything in house and not the least they have a direct link whit BMW factory who supply the parts they still use from them .
more info on there website Diemax High Performance Diesel Engines - Home