Couldn't find a model anywhere else so I made my own. This is the top parts to glue onto a glove. Final product as is fits a medium sized man's glove. Scale to your liking. Print the finger pieces flat and the "main" part vertically with the wider side facing down. I printed with supports but suspect they aren't necessary. Also encourage you to maybe scale down the ring and pinky finger pieces slightly. I did 95% on the ring and 90% on the pinky.
As a side note - I wanted the main armor piece to fit my hand a little better so I heated the PLA with a heat gun (while wearing the glove I am gluing it to) and bent it around my hand. Worked very well and gave me a custom fit.