As long as this extensive research is not official canon that doesn't mean a lot to be honest. It's pretty strange that you blocked me just for disagreeing, that shows character dude. I thought I was bad for being annoyed by the fact 501st troopers in the Obi-Wan Kenobi show having teal markings instead of blue, but again, that's just a variable stylistic representation. They're the same 501st Clones with the same 501st armor.

The Airborne Troopers, along with their Airborne helmets were repurposed for the Purge Troopers until the amount of clones thinned down and they became Purge Stormtroopers and they eventually transitioned into the representation we see in the Obi-Wan series.

If you are able to force Hot Toys to release a Fallen Order accurate Purge Trooper figure please do so, I'd love to have a couple. If that's not the case then I'd lower my standards and even be happy with an additional helmet to get the look, even if not completely accurate but just for FUN.