The aircraft is the Commonwealth CA 12 Boomerang and the model is a payware model by Flight Replicas. As Australia was unable to purchase aircraft in the early stages of the war, they were forced to develop their own aircraft. The Boomerang was the first Australian fighter, fully developed in Australia. It shared a lot of parts with the Wirraway, which was base on the North American NA-16 (T-6 Texan).
Most likely because it looks like an aircraft from a comic book I fly it a lot. Although the real thing had a lot of problems with the engine (overheating), the model is a pleasant aircraft to fly in the sim.
In FS2004 I fly the freeware CFS2 model by Akemi (Hago_Chu) which is available in the library. Morton did some very nice textures for this. I have never tried, but I think this model works in FSX as well.
And private jets with Russian registration in an exotic place always make me think in James Bond scenarios...... (Especially when these are painted black).
Cheers,
Huub