vintage junior sander

[mikemayhem58]

My father pass away and I have aquired his black and decker , junior sander, 7 inch, type v, cat.# 91, ser.# 2346554. It has no brushes or caps. I watched him use that sander many a years when I was a kid. Any info on the size of said brushes, or where to purchase would be great as I would love to hear it sing again.