The original GM 54/55st 6v electric wiper is very hard to fine (with mounting bracket).
Wiperman is the only way to get a vacuum wiper rebuilt with original parts.
I only use his services.
What other types of ideas are you looking for?
Ways to have more consistent vacuum?
- vacuum reservoir (I will try this someday)
- dual-action fuel pump (better than stock set-up for almost constant wiper movement)