Installing my PIAAs

I'm trying to find a good place to run power to my PIAA switches from. I've got my driving lights and fogs run in with the stock lighting, but I want my roof light switches to be run off switched power that is only on when the ignition is on. Doesn't really matter where it is, I just want something to wire to.
thanks

 

[mattadams]

I wired all mine off the radio, that way they can only come on when the car is on.

 

[akcrogers]

btt