BWMastery.com has created a Mac-based software tool called QuadToneProfiler-QuickCurve that enables a very streamlined linearization workflow for making digital positives for steel-backed polymer plates. This is a 20-page pdf description of that workflow.
Quadtone RIP profiles for making digital positives on the Epson R3000, 7800 and 1400 printers. These were created for use with the Toyobo KM73 flexographic plates. For more detailed information on the process go to polymerphotogravure.com.