You can purchase larger catch cans, and mounting brackets and such to go with them, they are sold for performance applications. Here's some examples on Summit and Jegs:
Search Results for catch can - SummitRacing.com
catch+can - JEGS High Performance
I've been running the exact same filter you have on my Firebird for a few years now. I can't tell from your pic if you removed the white filter element inside the cylinder or not. Mine is still in but I have heard that it should be removed, I may do this at some point. I empty mine when it gets filled to the bottom of that filter element, which is about half full, and that happens in about 400 miles. Here's a pic of mine, I mounted it to the cowl in front of the brake booster:
