Paul Reed Smith
The famous custom guitar builder has at least made prototypes of two custom electric mandolins. Above, two different takes on an acoustic/electric with a Baggs pickup. Below, a solidbody 4-string with a Seymour Duncan replica of a Fender Mandocaster pickup (in what you'd call the neck position) and a Baggs. No word yet from PRS on when or whether they will begin production.