FYI They updated their website. It's all available online now.
http://www.colgancustom.com/shop_vmake.php
Then Go to BMW-->M3-->Coupe-->2010. They have multiple "coupe" listings, rather than separating them by E36 E46 E9X, but the one near the bottom that just says "Coupe" in the pull-down menu is the correct one.
I wonder if there's a way to cut a hole in the bottom or something so that my OEM BMW Performance Splitters fit/slip through. WKBRDR, can you comment on that maybe? Thanks.