Your shell catcher choice depends on what you want it for. Are you going to be shooting Skeet or sporting Clays where you'll want to remove it for doubles presentations -- or, use it the full round like in Trap shooting? Like 1-oz, I've had good luck using a T&S clip type on my R-1100. One word of caution, some of the older metal clip-in holders have sharp edges.
Years ago, I recall seeing the local USMC Skeet team using a simple rubber band for a shell catcher on their R-1100s - for doubles, they'd pull it back from over the ejection port. Another method is to drill two angled holes in the top of the ejection window, one at each end. A curved piece of piano wire is bowed between the holes. It's simpler than a clip; but, the wire is easy to lose.
I don't know if there are any in current production, there are the "basket type" shell collectors. They are probably more appropriate in trap shooting where there is less gun swinging.