New tool: Speculum.

It is a special tool that makes your cosmetic item being mirrored (left <--> right).
Additional (prefix-)style (or - better word - version) "Mirrored" will be added to the item (so you can switch between normal and mirrored versions of the item). If the item has the styles, the version and the style can be combined.
For example, if you make the Mirrored Googly Gazer, you will have it for the left eye (the reflexion in the plane, which parts the body vertically - to the left and to the right). Also, the styles of the Googly Gazer can be switched too.