https://warmerwarehouse.com/Tundras Hand Warmers 40 Count - Safe and Odorless Single Use Air Activated Heat Packs for Hands, Toes and Body - Up to 8 Hours of Heat - TSA Approved $19.99

Amazon:

https://www.amazon.com/Tundras-Hand-Warmers-Count-Activated/dp/B07GNW4WKN/ref=sr_1_6?dchild=1&hvadid=78477717702854&hvbmt=be&hvdev=c&hvqmt=e&keywords=cheap+hand+warmers&qid=1573402542&sr=8-6

Dollar Tree

Hot Hands Hand Warmers and Toe Warmers, 2-ct. Packs

$32.00 Per Case

Have order shipped free to a store near FDDR so someone can pick-up:

https://www.dollartree.com/hot-hands-hand-warmers-and-toe-warmers-2ct-packs/261620

Industrial Safety Gear

https://www.industrialsafetygear.com/Hand-Warmers.html?gclid=CjwKCAiAh5_uBRA5EiwASW3Iaj5yUFEK0jW_y_0lUg4Nb0koIdt_13D8u0xjXqfw6wSWHg609vW4uhoCyNkQAvD_BwE

Warmer Warehouse

https://warmerwarehouse.com/