Nobody is willing to pay the labor cost, to seam tape a 5 finger glove .. even in Cheap labor countries.

Outdoor Research wherever they contract those to be made "made" a taped lobster claw shell,
but I dont think they made many, then Quit..

I have resolved the wet hands issue by Buying a Cycle Rain Cape that is Long enough,
To Drape over the Handlebars, and so then they just have to keep my hands warm.

If you want Dry gloves I suggest the Rubber ones over the liner gloves ..

as seen on the Bearing Sea King Crab trap handlers on "The Deadliest Catch" on Cable TV..
I think they wear 2 rubber pairs..