any thermofibre in the USA

i have been searching high and low for wavy long thermofibre hair.every web site i incounter is from the uk.is there any websites that carry it in the good old usa.i mean are the uk only familiar with hair extensions?nothing against the uk .love the uk.but i am more comfortable ordering from here. because i know what i will pay.i ordered once from a uk place. and when i received it with the invoice i couldnt believe the price.also it was a wrong color and they said i could retyrn it.but they with held 20% of my money.awful. anyways any of you gals have any idea.i am getting a migraine looking for these. thanx