I remember some one talking about putting a GPS phone some where under the plastics to use it like a cheap OnStar.
They also have thoese GPS things that parents hide in there childs backpack.. try that.
Alarms are like 50.00 on ebay.

If you find your bike at a stunt show. Get the cops involved asap. Dont go rambo and beat the crap out of the guy or you both will be seeing a judge in the morning.