Well, it was worth the extra work to get it to work.
I used the lens that came with the Catalyst.
I went to Home Depot and got a washer that was the exact size of the inside of the emitter and the hole in the washer was slightly smaller than the lens. Screwed it on and it fit perfect with the emitter that I wanted. Then I took a drill and put some holes in the emitter to allow some of the light to flow through.
Very Nice!!!! That is the exact emitter that I would use also.