When a customer wants artwork reproduced on paper, I traditionally use Breathing Color Pura Smooth or Velvet, which are matte papers.
However, I have a few customers who have glossy originals, and lots of dark but extremely saturated colors. (For example, LAB 23/55/28 aka ProPhoto 73R 21G 17B) These colors reproduce well enough on Breathing Color Crystalline (gloss canvas) with a semi-gloss coating, and even better on Black Diamond Gloss, but are of course way out of gamut for matte papers, so reproduce much less saturated.
I haven't had any artist like the look of their print on RC gloss paper. Is there something else I should be looking at, for fine art reproduction with a tiny bit of gloss to provide a much wider color gamut - especially in those dark very saturated colors?