I don't even know, if they still sell them. Probably not, because the CM *Storm* brand has been deprecated.
Anyway, there's a ton of these pads these days. Besides SteelSeries QcK/SteelPad and CM Storm Speed RX (there was another model with a slower texture too), I've had some from Kingston, Corsair, Roccat (those were at least a bit different) etc. Choosing an exact model is a matter of what exact size, rubber thickness, cloth texture and price you're looking for. Like, let's say I want something very wide, but not too deep (i.e., closer to 30 cm than >45 cm), thicker than the basic 2mm rubber, faster than QcK and as cheap as possible… that leaves me with only one pad, then another a bit thicker for extra €5 and one or two more that are a worse match in terms of size.
All that said, I use only a cheap pseudo-branded mousepad/deskmat these days, besides the aforementioned plastic 4HD:
What I do use is C-Tech Anthea XL, which is ridiculously cheap (€7 in a local store), has all the bell and whistles (stitched edges, 4mm thickness, decent texture), and fits my tray perfectly (90×27 cm). The only downsides are the fugly red logo (but I usually have something covering it), and who knows how they've made it so cheap... but then again, there's no guarantee, that SteelSeries' or anyone else's suppliers don't use child labor and what not either.