It looks like I might get the opportunity to pick up a "Wurlitzer Funmaker" organ for free sometime soon. It seems to work fine, but some of the keys seem to 'sag', ie sit a little lower than the rest of the keys. It seems like this is something that should be fixed. How is that done, if at all? Here's a pic of the style of organ. Nothing fancy, but I can't complain about the price!
Check out MITA they can probably hook you up with replacement parts and a local technician. It appears as though there were 12 different Funmaker models produced, and MITA has a handy model cross reference section, links to suppliers, manuals, etc.