I am about to start building one after scouring the internet for a pretty long time searching for a jumpseat for my MC. Figured I would throw this thread up to see if someone on the off chance, has one sitting around or one they would be willing to sell. As far as I know, they were a factory option, but not often selected. I think it would be easy enough to build, as others have shown over at Teamtalk but I would rather have the OEM solution if possible. Honestly the big thing for me is that I just don't want to deal with the upholstery. I know its going to be impossible to match it.