Amazon has Dr. Scholl’s AIR-PILLO Insoles for $2.50. Free shipping with Prime.
Choose "no rush" shipping for a $1 digital credit.
https://www.amazon.com/Dr-Scholls…B01MQ
Description:
Designed for people whose feet experience discomfort during the day
Double-layer system provides support and cushioning for long lasting comfort
Bottom layer of Sure Grip Foam stays in place with less wrinkling and bunching
Trim to fit in virtually any shoe
Dr. Scholl’s offers a Money Back Guarantee if you’re not satisfied with the product