I use snowboarding gloves. If you live close to a town I would make a trip into a good sporting good store and see if they have any. Or good skiing gloves.
Sounds like you might need some heavy duty winter gloves. The non sport lover gloves are cheaper and work good. The non sport lover gloves use a coating to make them water tight.
I mainly use the sport lover ones, and they have lasted me for years. They are basically a sport lover shell with insulated hand warmers. Draw string on the top so snow cannot get it. Might cost you $60 or even 80. But they will last for years. Especially snowboarding gloves like Burton etc. They are made for abuse. And believe it or not have very good dexterity for your fingers. These are mainly for very cold weather. Different temperatures different gloves.
