pretty sure they exist, if i remember correctly i had a pair a year or two ago, i think i picked them up at sports authority. Sorry that i have no idea on brand though, I can't find them anywhere.
Seriously though i used these gloves on many wet days this ski season. Not once did I ever feel any moisture on my hands even on the wetest days. I wish i was exaggerating because then I wouldn't be putting myself out there like this but these are seriously the best gloves i've ever used.
Just trying to get the word out there. Before these gloves Hestras were my favorite but even they got soaked in really wet conditions and the moisture was retained because of the insulation. With the Vertex GTX glove you get the warmth and dryness of a mitt with the versatility of a pipe glove.