I was thinking Sutton too. Fusion is close, but seems to have less distinct veining on the falls, less white in the falls, more yellow in the falls and more white in the standards. Fusion seems to have more he ruffles too, which makes me think Catt's iris is a bit older. Still it's the closest I've seen. It has the light rim around the falls, the bluish streaks below the beards, similar beards, similar serrated edge to the falls and standards. The differences may just be lighting, the age of the bloom, or the difference in soil & climate.
Here is another photo of Fusion with similar lighting:
Fusion vs. Catt's Noid
I can't find anything closer. If you are lucky maybe someone who grows this can send you a rhizome to compare.
Or maybe someone else will have another suggestion.
Good Luck Catt!