Oh, man! That’s a bummer!
What about this one? Sunbeam ChillAway Heated Wrap, Garnet, TCFQR-310-00 https://www.amazon.com/dp/B00FHW8XQ4/ref=cm_sw_r_cp_api_i_W1qHFb5MFAMPT
Mine is a sunbeam/Therapetic brand if that helps your search any. Try searching for a heated wrap instead of heating pad. You can also get a regular heated blanket or throw and ball it up the same way. It’s just bigger and bulkier. But it works too.