Its not too late for this rare Cat. Updated - http://www.yakez.com/for-sale-detail/1966-Buick-WildCat-Convertible_16859241566791286729.html
Found it again. It looks like so far the speaker installation has been kept to a minimum. http://www.yakez.com/for-sale-detail/1966-Buick-WildCat-Convertible_16859241566791286729.html