Hi Jon
There's a ton of guidance on here from people who've done this themselves ... its a matter of personal taste in the end .. Its a very subjective subject due to the variance in grading on images and film etc. So i doubt you'll get many takers to dye it for you if im honest. no one wants the responsibility of being told its 'not what you expected'.
Also to be honest .... a lot of this hobby is about having a go yourself and getting input and support from others so there's a level of expectation that most folks on this board will be here for advice on doing it themselves.
As most of the base outfits are supplied in cotton i'd follow someone else experience and give it a go ... you can always 'knock it back' later if needs be. Or .. trade in the MOW one and get a pr-dyed suit from Arkady who's been making flight suits for a long time. If it was me id definitely just give it a whirl.
You actually just need to search at a fairly top level and you'll find a lot of threads on dying the flight suit so even if its cost you a bit and you're slightly nervous of giving it a go there's enough input from members on these pages for you to be able to do this and ... feel an awesome sense of pride for giving it a go. in the time you'll spend waiting for a response you probably could have done it yourself anyway.
anyhoo .... Some starting links you may find useful which literally took two seconds and good luck!
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Flight Suit - Correct color for ROTJ Boba flight suit.
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Dyeing the jumpsuit