Amazon currently has:
Sonifresh Toothbrush Replacement Heads, Electric Toothbrush Heads Fit Philips Sonicare Diamond Clean, Healthy White, Flex Care, Easy Clean, Kids Brush Handles, 8 Pack on sale for $7.64 with Promo Code.
Save 55% off List Price of $16.99.
Promo Code: PKNHSUUF
Rated 4.2 out of 5 Stars
Free Shipping for Prime Members.
https://www.amazon.com/dp/B077D5ZSDW?th=1