I get it on line or a Lehigh Valley Plastic in Allentown. comes in a 2 pint can. I also use it to repair dash clusters.
This old dash was repaired many years ago with it replacing the radio hole cutting one from a standard radio cover. Cut it a tad big and hold it against apply the solvent on the corners and it melts its way in place. This was done back when you couldn't buy the aftermarkets. I also used it to change one from standard heat to A/C