. Want a real custom Cadillac get a customizer, just like way back in the good old days, like Elvis did.
Porter 
You mean how like those "Pimp my Ride" shows do? Where they often re-do interiors in bright colors and add accent piping?
Heck, even here in Connecticut I see alot of cars and riding on huge chromed rims with Vogue whitewalls. The SUVs with oversized chrome spinning rims too. DTS and CTS with add-on roof packages, gold trim and tinted windows.
Yup, Detroit is right. The public wants dull, ordinary cars. (rolls eyes)
I'm not saying everyone wants to own a SuperFly Cadillac. But even those of us who like to keep our cars stock still lament the time when there were so many color combinations and option choices you never saw the same looking Cadillac twice.
What we are missing? Wheel choices? What are we offered today? Regular alloy wheels or Chrome pressed ones? Do we still get that choice? LOL.
Exterior colors. Remember when Cadillac had at least 21 colors, many exclusive to Cadillac and several Firemist colors.
Interior colors.... Black, Blue, Red, Maroon, Tan, White, Yellow, Green, Grey, plus whatever color matched a unique exterior that year. ie: Firethorn, Terracotta, etc .
Roof tops. Full vinyl top, Cabriolet half top, Fake convertible tops, Opera lamps, etc.
Pin striping. in colors to match the tops or interiors of course.
White walls.......sigh.