list updated in OP. I know there are more in Australia. come in Bruces....
Strictly speaking, the RHD Australian-built Group A racecar (now owned by Mark Petch) could be considered a lost 242GT. This is its VIN plate.
As people generally know, the Australian Volvo team first built it as a Group A car in July 1986, using a 242GT which Mark had acquired as a spare shell. When Mark was assured by VMS that the 242GT body shells were identical to the homologated Group A cars, he sold the car to Sheppard / Volvo Dealer Team and the team went ahead with the build. In November 1986, Volvo left Group A in Australia and recalled the cars to Sweden.
Many years later the car was acquired by Thor Rustod in Sweden, who restored and rebuilt it better than new, and then Mark Petch bought it and brought it back to NZ. The car is now racing in historic Group A events in NZ.
JFTR, Mark is making new copies of the genuine VMS Group A axle half-shafts for race cars, which were homologated to allow a little bit of camber and toe. The originals aren't available from Volvo any more, but you'd only need them if you're keeping a race car period legal. They're not cheap, but nothing in Group A ever was.