A couple of months ago I came across an arcade parts online distributor that listed the Druin Interface as something they had in stock. I don't remember the name of the company, but one of the services they provided was building custom control panels. It wasn't SlikStik, DreamArcades, or the other big name guys with banner ads.
You'll just have to do a search and find them. Unfortunately, every Google search I've just tried gets me page after page of BYOAC threads and not the company.