This is what I did for my '70 CST
3/16" textured ABS plastic sheet....less than $100 for a 4' x 8' sheet
anodized aluminum "J" trim
vinyl push-on trim for the edges
I found a pattern with the dimensions on line
these fit so snugly...I only put in 4 trim screws to hold them
The only issue is black only....which was fine for me when I switched from blue to black interior
stopped it at the B pillar and added the vinyl trim
you can see one small black screw here
