Yesterday I picked up a Castle Sidewinder combo. My oldest had a switch with a silicone boot over it. The castle doesn't. Anyone know where I can get a switch with the boot? I also don't like that the wires come out of the bottom of the switch so I can't mount it with tape so the switch is facing upwards.

The switch boot is not necessary. It really isn't for water, either. It is mostly for dust and dirt but as long as you clean it out every once in a while, you will be golden.