Unfortunately I don't know of any personally, but just wanted suggest bar mitts as something to look into if you're unaware of them. Or maybe heated handlebar/grips and then you could just use thinner waterproof gloves and have the warmth come from a rechargeable grip? I use some lined rubber gloves that have been good for me down to mid-30s in rain all evening.They say Chilly Grip H20 on them and came from the gardening/hardware section of the local store. If you have fully waterproof gloves, your hands are gonna get wet from sweat anyway, so if you're riding regularly in cold rain, I'd think bar mitts(pogies) might be good since you can wear regular breathable gloves under them and rely on the bar mitts to keep the rain out(as much as one can actually keep rain out when riding an hour+ in the rain...).