Here is a 63 Chevy Impala Boot for the AMT kit (this might fit the 63 Revell kits too)
NOTE: Please allow 4-5 days delivery on resin items as they will be made to order if not on hand.
Resin 1963 Impala AMT Convertible Boot
As with many resins, you'll need to clean up any excess flash, pin holes and wash down with a good degreaser to remove any oils from the molds. Also before paint, check fitment as resin differs from plastic parts.