ignition

What scanners and ham radio's (mobiles) can be vehicle mounted and will turn on when I start the car without me having to manually press the power button?

I need a relay for my radio equipment. This is how it has to work...I turn on my key, all my equipment comes on. I have one spot on my fuse box for the relay trigger. I have 3 items I need to turn on...A Motorola CDM1250, Uniden BCT15, and a GPS. Any ideas?