You can find them at Walgreens, CVS, Walmart, some of the local farm supply companies have them it the hunting section. Some stores have them under their seasonal section for winter

My husband used them during the winter when he worked outside.

But make sure you talk with your healthcare provider because you don’t want to use heat or ice on neuropathy type pain. With neuropathy you have the sense of feeling So you may not be able to tell the difference if it’s getting too hot or too cold. Make sure your doctor advises you.