Well, after much deliberation I have decided to go for a standard Defender grill. £30 versus £200 did help with my decision. I have ordered a complete set of Timkin bearings for the back axle. Wheel bearings and diff, plus new half shafts. Hopefully that should sort out the whine coming from the back.
The Puma bonnet is a statement! It says: I have a Ford engine that doesn't really fit this vehicle so the bulge is a bodge!!
It's a bit like the NOS stickers on the back of the 1.2 corsa that came free with 'Lax Power' magazine.