Thanks Rick, I tried to get the brushes but no one here offered them, and mail order was about $12 (Canadian), but found a local auto parts place who had the whole replacement regulator for $15, am picking it up tomorrow...
June 14...
Got it and installed, works fine so far. It was from "Wilson" Electrical products (part # 62-15-6635) and total cost was $16.45, a pretty inexpensive repair...