Yesterday I posted the link where you can get the collection of pre-made curves (on a different thread, but in response to your post): http://www.inkjetmall.com/tech/showthread.php?158-Curves-for-Canson-matte-papers
Please read my last post there regarding the printer models these curves will work for. This curve library contains pre-made Piezography curves for many different papers.
Yes, as per the curve link page (on our Piezography site) - these curves will work on the 7800/9800, 7880/9880 and 7890/9890 (as well as the other K3 printers I listed in the other post: R2400, R2880, 3800/3880, 4800 and 4880).