Thanks! I was able to find another thread where Ofer posted about fuse #15 being switched source so we tapped into that.
Just so that people can use this if they find it -- this is how I wired my BlingLights halo fog lights. We used the 4-pin relay that came with the kit, and an additional 5-pin relay which is available at your local auto parts store under a 1995 Trans Am "cooling fan motor relay"
We had to change the relay socket's wiring around a little bit, but essentially what we did is below.
Fog light kit from eBay was about $100, 5-pin relay was $13, and a mini-fuse Add-a-Fuse was $7.
Now my halos are on automatically, and when the sidemarkers turn on it automatically switches my fog lights on.
Quick shot of the halo:
Attachment 587888
Finished result - halos on (camera doesn't show the "halo ring" that well)
Attachment 587889
Just the fog lights and side markers on
Attachment 587890
Headlights, foglights, and side markers
Attachment 587891
Wiring diagram for the 4-pin relay and 5-pin relay
Attachment 587892