I may have some - will let you know tomorrow
you can get them cheap on e-bay or an Audi/VW shop. I got mine for £8. They are prefacelift A3 ones for sure, but not sure if they are the same for prefacelift S3's. I assume they are...Check the pics out on the top of the page to look for any differences.
Well my ones have the clip around the indicator light ?
Are the S3 ones different due to having wider wings? One of mine needs replacing I think, because the rubber seal looks a bit tired, why does yours need replacing may I ask and how much are Audi asking for replacements? Might be worth a try calling VAGparts.
Give Vag parts a call, they can get everything but only list a few things on their website