I'm assuming you mean the forward control arm--the U-shaped piece--and not the toe control arm which would be the rearmost lateral member of the rear suspension.
Might want to post your "wanted" ad in the "wanted" section of the classifieds. And, since it's a suspension piece, you might want to classify it as such, rather than "misc."
If you're in a big hurry, I hope you are not counting on the CEG classifieds. If you haven't already, check out
Car-part.com to search salvage yards nationwide. I just looked and found tons of rear lower control arms, but you'll want to call to make sure it's the right part.
HTH