Have you talked to the evinrude mechanic guy over in superior? I always seem to forget his name. All he works on is Johnson/Evinrudes and rebuilds engines. Maybe he'll take some off a used one for trading in yours, don't know. He's got a big garage in one of the industrial parks in Superior, near the perkins by Barker's Island and has a ton of parts. Really nice guy and knows his stuff.
I believe his name is Dave. Call my dad, he has his number. My dads cell is 218-428-5436