Not so may, but here are my favourites listed:

1. RealRapunzels -> realrapunzels.com

2. Hair2U -> sellfy.com/Hair2U

3. Amazing hair -> amazing-hair.de

4. Plings Playground (bondage and knee length hair) -> plingsplayground.com

(At Plings Playground, paypal only works for EU customers).

I hope this helped!