Finding satin media for a Designjet 130

I'm looking for swellable media for my Designjet 130; I've been using Instant-Dry Satin (Q7992A) which is OK, but does poorly with large fields of black. I've also used Premium Satin (CZ987A), which I strongly prefer, but I can't seem to find any through retail channels. Is it being discontinued? It's easily the best photo paper for the Designjet 130, so I'd appreciate either knowing where to buy it, or what its replacement is.