Cam models that Ive had long hair fetish sessions with in pvt (some in more than one occasion):

MyFreeCams - SpaceLady, Serina_, Julie__Moon (this was quite a while ago, her hair is still long now but not as long as it was back then).

Chaturbate - _rapunzeel_, mahia_meel, princsgirl_

Chaturbate is more flexible for PVTs btw. Models offer fixed rates on a minute basis on chaturbate, which can vary (some are much more expensive than others), but rates are fixed on MyFreeCams. On average, I've found I can get way more PVT time on Chaturbate with the same $ that I can get on MyFreeCams.