Default Replacement Accents?

Hi all,

Been looking around to see if there are sites for replacement accents, but I haven't found any. I did come across some on eBay; I was wondering has anyone encountered any site that sells the accents.

Personally, I would like to mix and match the colors (like metallic blue buttons with red camera frame accents and etc); also paint my own haha. Also, I might just get bored of the color that I decided at first and want to change. Anybody have that kind of feeling?