i made some of the brackets that mount the interior fiberglass. the small bracket on the wheel tub and the long bracket that mounts the big panels beside the seat.
the three brackets in the front that mount the big panel and the upper vent panel are original 67s they are the same 65-68 , i got lucky and had a set from a destroyed 67 fast back. i still have about 9 more brackets to go and they are not available so they have to be made. i already tried the fiberglass panels and it looks like a perfect fit so far.