It would be nice if they could re-introduce these papers in 2006, as it is their 100-year anniversary this year. I don't know what kind of volumes they sell or how big they are, but they aren't even remotely as active as Ilford, and their papers are hard to find outside UK, it seems. They seem to be struggling.
I have used Kentmere papers in the past and I like them very much (as much as Ilfords stuff), but when you have to search for their products, while Ilford is available on your doorstep, figuratively speaking, it's easy to be lazy. It just would be great if Forte, Efke and Kentmere for example had some participating presence here on APUG - with a little effort they would sell some more and have happier customers.
Since the swedish distributor of Kentmere (Kameradoktorn in Stockholm) went belly-up (or rather, gave up anything remotely analogue for the digital) the choice is to buy it from the UK. I haven't gotten around to that, yet.
In this particular case with the Art Matt, I'd be happy to hunt it down and see what it's like - as it stands to be a one of a kind paper for Bromoils for example.
EDIT: checked the distributors website and emailed them, getting a reply that they still do supply Kentmere in Sweden (although they don't show it on their website). Well, that's good news.