Gen 1 Olight S10 switch boot

Need some help here if I may. I have an old 1st gen Olight S10 baton that the kids play with and the rubber switch boot apparently fell out so I’m looking for a place to get a replacement boot. Any suggestions?

This is a picture of the boot that’s on this light. Unfortunately I’m not sure of the size of the boot in these lights. Hoping someone has experience with them.