I think there’s a place on Coney Island Avenue between Ave I and J (closer to J) that sells kallah packages of shaitel accessories (I’m sure you can buy individual pieces as well). I’ve seen them advertised in frum magazines. Maybe, check them out.
Jaimies beauty supplies sounds familiar. I don’t remember the name, sorry. I bought the shaitel heads and boxes from my shaitel macher. They don’t sell everything, though, so it might be better to check out a place that can supply everything (and choices) so you can select what you like.