I haven't found a source for repop, but I'll keep looking. In the meanwhile,heres my first go at it. I templated and used a nice closed cell foam material to cut to shape and size. My punch for the holes in that size is serrated so the holes are not crispy clean but they are unseen so who gives a
I plan to make a metal template and perfect the punch so I may make a few and offer them here for others. The material thickness is spot on and I will post pics of the next run this weekend.