This is an odd one... especially if you have a computer that is in a solid case, preventing you from even seeing these.

Two colour-themed computer motherboards, in Optimus and Bumblebee colours.

They are American, and no specific details are listed on the Seibertron site (I didn't go looking at the link, so don't have any idea of their availability here). These are probably for the geeks out there who build their own computers, or upgrade their own hardware themselves, instead of the "easy" option most others do of just buying a new computer.