Been looking around, and for the most part, the H&A and ACAs I''ve seen are, at most, faint fluorescence. Don''t the H&A cutters think some people might like a fluoro stone??
The market says there is a penalty for fluorescence, even though there used to be a premium, so many people do not cut the finest stones with fluorescence, but there are many available if you just ask.
Also, some cutters, like Paul Slegers of Venus by Infinity will cut to order for you so obtaining a stone with fluorescence is not a problem.