FWIW, this is their price list. Shipment is 7.70 € (or, you know, order for 600 € and it's free ).
So yeah, markup is huge (9 € vs USD 36, if they're the same products, which I assume). But then again, it's (I think) a small company and not much gets exported.
I've just sent an e-mail to them asking for US shops that stock their items. I'll get back to you once they answer.