I fellow from a Movie lab is Australia just posted on the cinematography.com website that he has been told that Plus x reversal 7265 in 16mm and Super 8 as well as Plus-x Motion Picture Negative 7231/5231 in 16mm and 35mm are being phased out.
sure enough the suggested replenishments are Tri-X reversal and Double X negative. So much for the idea of buying some 5231 if regular film becomes hard to get...
(the Vison2 stocks on that PCN are pobaly all covered off by the newer Vision 3 stocks... Kodak Does introduce NEW products. - I even noticed that Ektar 100 is now shown on Freestyles site as being available in 4X5 and 8X10 Sheet film)