[Ray]

Wow, that's a lot of alarm stuff.

To add power locks you need to get the actuators from a vehicle with power locks, install them in your doors - run the wiring, relays, etc.

May i also suggest something?
Build a steel box - or buy one. Bolt it to the floor of the van from the inside of the box, put the tools inside, lock the box with a couple big fat padlocks.