>>9366805For legends scale, NewAge has their Jazz out already and it's fantastic. MagicSquare is also doing one which looks pretty good. Both are G1 but both have very different aesthetics. Iron Factory also has one and it's a fun toy but nothing that will really blow your mind, plus it's pseudo IDW aesthetic which you may or may not be into.
For CHUG, there's nothing 3p.
For MP scale, G1 Jazz has a few options but your mileage will vary with finding which one you want. MakeToys's Jazz is a lot more slavishly G1 but it's largely agreed to be the best G1 MP on the market at the moment, though folks have cooled on it a bit and it has some flaws folks are starting to agree with. There's ToyWorldW/Zeta's Jazz which fits the MP-10 era aesthetic better but comes with a host of other problems like the way the calves are attached to the ankle rockers which completely ruins the sculpt/silhouette in anything more than a light A-stance, forearm gaps where the fists flip out (inexcusable on an MP scale, IMO), plus I absolutely hate the knockoff sponsor decals (shit like Mortini Racing) and while I understand why, I'd rather they just not use sponsor decals in the first place. Gorgeous alt mode though. Transform And Rollout also did one, which I have. Bit closer to MP-10 era aesthetic but not quite, very fiddly transformation, and not the best articulation, but it's still good looking and they had the balls to use the real sponsor names on the decals. They got chased by lawyers for it though so it may be harder to find these days. Then there's FansToys who teased one but it's FansToys so we probably won't actually see a full reveal for a decade, and it will look good but be too expensive and bogged down with unnecessary diecast and in the worst places, like important ratchet joints. For nonG1, there's Generation Toy which looks cool as hell but good luck getting your hands one one these days. It's long since out of print.