I have an '89 IROC Convertible, and I'd like to know what spoiler I need for the rear. Mine's a little banged up, and I'll need to replace it soon.

 

Nice looking ragtop there!!
Now, regarding your spoiler - I hate to say it, but you are up for what might take a bit to find. The rear spoilers on the convertibles were only used on them, so basically you have to find one off of a wrecked one. Convertible-specific parts are hard to come across and might be a bit costy.
I'd say fix the stock one if at all possible - if not, keep an eye on ebay etc. Oh, and check with thirdgenresource.com, thirdgenparts.com and hawksthirdgenparts.com (links on top of the page). At least one of them had a convertible that they were parting out a little while ago, so it might be worth a shot.


Ken