My original dash had delaminated badly too, plus having a few extra holes that pervious owners added. You can make a new base to reveneer easily enough. Use marine grade plywood, finished on at least one side for a smooth surface. Use the original for a guide to routing it out, both the holes and the indentations on the back, I used a Dremel tool to do the routing, got a handle setup to allow its use as a router. Then veneer when that’s done and cut it away from the gauge/switch/etc holes.