Does anyone know where I can purchase silicone covers for the wide mouth born free glass bottles? I am getting ready to go back to work and freezer stash of milk is well underway, but not my supplies

My daycare will not use glass unless they are covered. I purchased 2 -3 packs of the 5 oz born free glass bottles, but they only have one sleeve each. I need 4 more. I found siliskin universal silicone covers online but they are out of stock everywhere I look.

Any other suggestions? Much appreciated.