Cupholders

Go recon the local u-pull.

or...I made one from 3 1/2 inch PVC couplings and some rack mount equipment ears.

I even cut slots in them with a dremel to clear coffee cup handles.

Downside is PVC doesn't hold paint very well (but cleans easily) so you're basically stuck with either white or gray.
I WENT TO A MARINE SUPPLY STORE AND BOUGHT A STAINLESS STEEL CUP HOLDER AND PUT IT IN PLACE OF THE ASH TRAY IN MY 68 FASTBACK. LOOKED FINE. BUT HAD TO REMOVE IT TO MOVE MY SHIFTER BACK 5 ". WAS FAIRLY CHEAP TO BUY. disregard caps !