Pondering this shrinking paper availability problem, maybe I'm going at it backwards. I wonder if these companies offer swatches. What I'm after is a fiber base cold tone with the old Kodak unferrotyped F surface. One that will turn that hint-of-violet neutrality in weak selenium. I would think that even today, many of these papers have that olive-drab color that you are unaware of till you kill it in weak selenium, and hold the prints side-by-side.
Notice I said violet, not purple. I too had always though the 2 terms were interchangeable till I saw a PMS ink book.
I wonder if you could contact these distributors and get a sample package. Barring that, perhaps one of you readers can point my way. Thx.