The Pure Nuff Stuff is an independent run online store, by three women in England. I really don't think they personally sell their products IN America but you can order from their site I'm sure:
I've contacted them a few times and they're very sweet and polite, so I'm sure if you asked about shipping costs they wouldn't mind!
And I think the Green Tea gel has been discontinued here. I snapped up 4 bottles of it in Sallys when it was £3, so I'm hoping something new will come out before mine finishes!