Found 2 rolls at Roberts Camera in Indy.
Now I have to decide if I want to find an alternative or buy up 5 years of stock.
Dan,
Of the samples I have none has an identical spectra plot to the Ilford Mono, not in the SpectrumViz Obsolete media map either. Based on the white point, gloss, texture, there are some alternatives, you can see them in the screengrab that also shows that the plots are not identical. Be aware that this is not telling how they perform on the printer, what the image quality is or what it does in time. The Epson EEF is among them and it has a bad reputation on the shift of the paper white in time. It is also a lot heavier.
I put the Mono Silk in the Satin map based on the name but it comes closer to Gloss varieties than to Satin etc.
Met vriendelijke groet, Ernst
http://www.pigment-print.com/spectralplots/spectrumviz_1.htmMarch 2017 update, 750+ inkjet media white spectral plots