Can anyone help me find the following parts for my Craftsman Belt Sander (MN# 315.22420)

I have owned this tool since I was 11 (bought it in 1961). Wife says I should just toss it and buy a new one!!!! I need the switch and a set of brushes. *****.com says the switch is unavailable and the brushes are o.s. and have a new replacement part number. Sure would hate to give up on a good friend/tool, done a lot of projects with this sander and it has never failed me until now (the swith litterly just crumbled in handle.