NP, this is not an equivalent product to what your Quad had. This is lower density and much lower abrasion resistance, basically the same as Kaowool M-board. Temp-wise it's fine, but bump a split into it and you'll leave a significant gash. It will not last long unless you have a very tall firebox where there's no chance of wood coming into contact with it.
The stuff you want would be rated 2500-2800F or higher. I spoke to that vendor in the spring, he told me he would have the higher density board in 1/2" thickness available by this fall. You might want to ask him about it.
This board is not so abrasion resistant but the company that sells the board also sells "rigidizer" that is supposed to provide a protective coating. http://www.skylinecomponents.com/CeramicFiberRigidizer.html I haven't tried it myself. I only have experience with a 3/4" calcium silicate board from another source that flakes and breaks and might make it through the season but isn't good enough that I will use it again.