If you're just looking for an outer layer to layer up with, what about something like the Mountain Hardwear Transitions Jacket. Granted I don't ride in really cold conditions, but it's been functionally windproof/breathable for me down to 28 degree riding and down to around 0 when running (I haven't tested it below that threshold.

Another take on the same thing is Marmot Variant. It's made of breathable/windproof fabric, and the front chest panel includes insulation. I haven't seen many reviews of it & none for biking, but I think I might pick one up.