Irwin never re-released that figure. The only release of that Vegeta that I am aware of was by Bandai America in 1997. There's a possibility that Bandai HK released it in the eastern part of the world, but I'm not 100% sure if they did or not. Bandai HK definitely released the same Bandai America 1995 DragonBall 2.5 inch figures that were released in the US, so that's what makes me wonder about these. Regardless, I know Irwin never released that figure.
There's a bootleg of the Goku from that set and he has yellow hair and green eyes. Surprisingly, the bootleg of that figure is crazy rare compared to the authentic one. And these authentic Goku and Vegeta figures are pretty rare themselves.