https://rebuildingtricowipers.com/about-me Got a NOS wiper motor from them for my 57 T-Bird many years ago.
Some of the time all these vacuum motors need is a little oil....The oil keeps the leather paddle sealed...
I love my vacuum wipers, besides their traditional. Love the sound of them clicking when they switch back and forth. But my wiper motors work great. And the 472 has lots of vacuum.