Although we do not currently carry a 3" x 1.5" label on an inkjet roll, I can forward the request to our Product Development Team for review. The RL2801IW has a 2" core so it would not be recommended for a Primera LX900 which requires a 3" core. I have included a link below to our 3" core products which would be compatible with the LX900. https://www.onlinelabels.com/material_inkjet_roll_labels.htm#3" Core Inkjet Roll Labels