Is it a circulation thing?
Heat helps my tendonitis and nerve compression. So I take one of the thermacare things, and carefully cut along the lines to separate the little heating sections. So one thermacare pad can cover 4-5 areas.
Thought this might help you get your hands and toes warm, maybe in a cheaper way.
I don’t think it’s circulation. I also have a disorder called Cold Agglutinnin Disorder. I think it is related to that. Although, I remember having cold hands and toes from even in college back in the mid-70s.