it comes from a scrapped out machine from my work. it is used to lock the machine into an open or closed position. it is made by another company. i will try to post the name written on it. perhaps they can be ordered.
I think the brown will tie in with the brown tiles on the lower walls better than having the black. It might look checkerboardy with the opposites like that. Just my 2 cents.
after looking at it for awhile i think you are right. also the brown carpet tiles are softer and easier to bend. it would also give me brown at the front of the bus, and brown ant the very back. i just hope i have enough brown carpet tiles left.