As an alternative, I've wondered about gluing a Kensington type of lock onto the body of the Surge Guard, then using a laptop lock. Of course, it is easily cut by bolt cutters, but the padlock on the lock can be cut as well, and thieves want easy pickings.
I've wanted something like a fiber optic loop that wraps around a fixed object. If it is broken or disconnected, the device ceases to function and a Lojack-like transponder turns on. This technology isn't expensive, and it would force thieves to have to not just steal something, but take it apart to kill the antenna... and then, the best they can do is have their fence sell the broken parts on eBay.