Hi Flight Simmers,
I came across the following site in recent times produced by Rodger Dodger Aviation LLC in the USA where modificatioins are made to various flight control units.
Although the purpose of the naming of the site was for "fixes" to various brands of yokes and pedals, there are a number of other youtube links ( at least 150) for other issues like building home made cockpits of various shapes and sizes and modifications to keyboards for various types of aircraft. Some of the "stuff" has to purchased and as a consequence I haven't listed an alternative web address for the acquisition of the various plans and modification templates. However, if you are interested in a particular product after watching one of the videos from the nominated listing above, then follow the link(s).