Robinson left the car with Colin Roberts (Anglia, Mini and FF Brabham driver) when he went to the UK. Roberts advertised it for sale in 1972, though he may also have done so earlier without my noticing...
The car originally had Heron uprights, but Robinson fitted Brabham wheels, so may well have added Lotus 33 uprights at the same time. The story was that the car was dismantled and the parts scattered, but Tony Baker himself believes it still exists in a Wellington garageIt was reputed to have had some Lotus 33 bits in it (rear uprights and maybe some other parts) so may have ended up being parted out?
Finally, nice to see a one-time Heron owner on here - welcome, Perry!