Cc defs has cupholders. The small thin rectangular piece at the bottom of the headunit surround, above the coin tray and cig lighter, is replaced by the cupholder tray. If you take out that faceplate you can undo the 2 screws behind it to remove that piece and screw the cupholders in.
Can find cupholders in any 1.8L cc like glxi and executive models, gsr and evo. Also, all ce cupholders fit too. They are exactly the same. You could wrap the faceplate itself in a carbon vinyl wrap if you want too. Will save you hours of work and headaches and money.