Anyone know? I did a search but got no hits... Battery Junction is American I believe. I'm thinking more brick & mortar stores, maybe Home Depot?
Serious... hehe...
You can use any kind of lubricant for condoms. Yes, if can lubricate a condom without damaging it, it will work well in o-rings!
I use K.Y. here.... for the light´s o-rings, of course!