where can i get a replacement fog light for my 89GTA and what am i looking at for a price?

You can get the P/n of what you're looking for here

http://www.deadbird.org/diags/bird/a24.gif

And if they carry the part, you can get a ballpark guess of what it will cost
www.gmpartsdirect.com (I use them to know how cheap I can get stuff from the dealer wholesale for)

If they don't have it for pricing, you can try www.parts.com. Expensive, yes but, you'll know about what you're going to pay if you're not finding one in the junkyard.

Another option is just go buy a cheap pair of foglights from walmart for $20 or somewhere & rig up some mounts to put them on instead. That was the route I took & I've seen others do the same.

I found a set of fog lights at autozone ($19.00) that all the internals fit exactly into the factory housings, everything right down to the lens and chrome trim. ALOT cheaper than the $100.00 + dollars ea. most resto places want. and oh yea, if you want to brighten them up just replace the 55 watt bulbs with 100 watt bulbs for off road lights (ALOT brighter).

you remember what the number on those fog lights u got at autozone were... or at least what brand they were...?

I'll look for the reciept in the morning but I am not sure I can find it. I know it was just a cheapo set with the chrome housings, I just removed everything from the housings and transplanted it into the factory units. took about five minutes each one. not a problem.