I too am interested in the Piano Forte IX-T. Despite being launched over a year ago, the -T series has managed to remain virtually anonymous. Final's Direct Shop says that they're made to order, so that could explain their apparent rarity. The -T series uses the same cable that was used on the TOTL LAB II, and it would be nice to think that the "improvements made to internal parts", referred to on their product page, are also derived from that flagship earphone.
I’ve always been fascinated with the Piano Forte series, especially the LAB II. I’ve got to go to the LA show next spring.