I recently ordered a regular suction cup mount I'm going to try putting on my speedo, got that idea from a friend. I don't have a windscreen though so I'm going to do test runs with my old cellphone and some loose-ish zip ties.
I've heard good thing about RAM mounts if you have a good central nut, their bar mounts get good results too.
I'm in Ohio as well, so pay no attention to the naysayers that ride all year round, we'll take what we can!