I imagine he got it off Amazon: https://www.amazon.com/Miccostumes-Cosplay-Leotard-Hairband-Leggings/dp/B073ZFR3TL/ref=sr_1_2?crid=25Z5S780GFP6R&dchild=1&keywords=2b%2Bcosplay&qid=1630873058&sprefix=2b%2B%2Caps%2C165&sr=8-2&th=1&psc=1
I've had this link bookmarked for a while now since I really wanna get it.