Talked to Bill Gatos at Mastercraft today. Yes the 4.2 TDI is available (europe) I imagine the TDI up charge is in the 30-40k range.
Got some specs on the V-drive and RPM with prop combo they are using. The 4.2 tdi is turning 5200 rpm with a 1.5 to 1 V-drive and a 14.75 x17.5 prop. The Dmax will run about 3300 RPM and use a 1.294 to 1 V drive and prop to be determined.