I have a friend that has a 200E 12ga with 30" barrels. It's like this one

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=533966197

These two are the only ones in 30" that I have seen. My friends gun does not have the adj comb. I've heard that some 385's may have been made in 30" 28ga. I would try to be first in line for one of those.

I have a 280E and 200E both in 25" 20ga. Had them shipped in to my local cabela's store a few years back. Could not decide which one I liked best so put together a deal to get them both. They are great guns.