I don't see how that question is relevant to the post of mine that you quoted, but as far as I know there is no game that offers that.

I don't agree with race change stricly because of how greatly each races base stats vary, it's not really fair to level all the melee classes as a galka, and then switch to taru to finish off the mage classes for instance.

I don't see how adding a feature change option for real cash could be so difficult for SE to implement. As far as we know this isn't even on the table. They have been ignoring this topic on both FFXIV and FFXI forums.