Just to add to the CEG database, here are the partnumbers for DEI relays and switches I ended up getting. I got some generic polycarbinate pin switches off of ebay though.
513T Mini Piezo 120 db "Pain Generator" Interior Alarm Siren
508D Dual Zone Motion Sensor/PROXIMITY RADAR MOTION SENSOR
555F FORD OEM PATS Anti-Theft Bypass Module
515R siren backup battery car alarm
?- Hood & Trunk Plunger Pin Switches
Since I have a few other electrical projects other than this, I got a 10 pack of bosch type relays.
Thanks for the PM Steeda, and thanks for the input Quick