There are many companies that have coated vinyl, such as, IJ Technologies, Sihl, Dr. Graphix, and Breathing Color which carries it in 17" wide rolls suitable for your printer.
I have some (red) epson k3 prints that are laminated and have been outside, facing south for almost 3 years. No signs of fading. These prints are part of an experiment to see how long they'll last.
I have them next to some thermal prints (non laminated) that I printed from a Roland PC50. These prints have faded considerably.
When laminating with a pressure sensitive laminate, make sure you overlap the edges 1/8" - 1/4" to prevent water wicking under the laminate.