I don't have an answer but I am interested in the topic! It appears that ink cartridges are available for the following.
http://dyesubinks.com/index.php?pageto=printers.php
It is also important to remember that not all Epson printers support sublimation inks and cartridges. Sublimation inks are only available for these desktop printers: C120, R1800, 1400, C88+, 4880, 1280, C88, C86, C84, C82, 900(4 color), 900(6 color), 980, 3000, 4000, 4800, 7600, 7800, 9600, 9800.