Few quick reviews/possible additions to the list even.
So first up, I bought a custom colored robe/tunic set from khloes custom off of etsy. Did take a bit for the order to be made, but it was totally understandable, as I told her I wasn't in a hurry and ut was right around celebration 7 that I put in the order. Well worth the wait in every way, fantastic work and quality garments. I have since commissioned another custom set of tabard to go on the tunic to expand my outfit from her.
Got my sith acolyte mask from wicked armor. Didn't take overly long, price was reasonable, and it works lovely for photos and the like lol.
Few potential addons: roll4damage, leather shop from etsy. Bought arm bracers there and got them alright. Made a couple personal touches to them and they're pretty awesome.
Vontoon, another leather shop, ordered a custom leather belt just recently. They're great to talk with and have great reviews, I'll have to add more once I get the belt and harness I had commissioned.
HiddenAssassins, another etsy shop, has some very awesome masks, and works with you to customize them however you would like. Anxiously awaiting my mask from there... more details are incoming on that as well.
Illumicyberwear has some really cool Led visors as well, for reasonable prices that might match a look youre going for, but their customization options ate limited to what is listed, it seems. At least color wise. I hear they may have better customization for design work.