If you want the long smoke stacks re-issue just get one of the Japanese releases and there are zillion versions
available already: Encore, iPod (2 difference colors + 1 fire red limited edition), Collection Series, New Year, etc. Hasbro will never sell the long smoke stacks version because of the child safety issue.
If I had to get another G1 Prime I'd rather has the show accurate head of the iPod version or the energon axe of the Collection Series instead of the voice box but that's just me