I know a few tige guys have been looking. the variables would be width of boat and width of brackets. beyond that the actual shape of the platform and depth are not that big of a deal.
if you made the bottom pieces large enough where the brackets need to bolt to as a universal fit and kept the width at 96" vs most boats today are 102, that would leave you a "generic" template that you could sell and others could then mount the brackets to fit their transom. spacing it back an extra inch for any curvature in the transom depending on your platform curve.

great idea and betting you will sell a dozen or so a year.