There is/was a 240Z in Sydney which had the complete dash out of a lateish model Nissan fitted, saw it last year, from memory it looked quite good. Don't know how much work was involved, donor was a Silvia, 180 or 200SX, something like that.
The alternative which I've thought about is a custom 'race' dash, lots of aluminium with a pad along the top. The minimumilist look.
BTW Dan, that car of yours is gorgeous. Even if the steering wheel is on the wrong side.