http://www.brandmanagementgroup.com/I think the above url tells more about the changes in HP media like the Matte Litho-Realistic and your medium. The above company probably has more to say about the products than just their distribution. At the Photokina 2012, 30 months ago, it shared the booth of Innovaart and it had several rebranded Innova products in their "Kodak" catalog.
There are more links to find between Innova and BMG. Since then HP inkjet media have been added to their distribution channels and reports appear here about media changes and article number changes.
I have used HP Prof. Matte Canvas but not recently. Good quality but not cheap. The site above says that this canvas quality and other canvas qualities are discontinued. Two canvas qualities branded as HP are now distributed, two canvas qualities branded as Kodak, could be the same. I hardly print on canvas these days so can not advise you but it might be better to add other manufacturers in your search for a good quality canvas.
Met vriendelijke groet, Ernst
http://www.pigment-print.com/spectralplots/spectrumviz_1.htmDecember 2014 update, 700+ inkjet media white spectral plots