Looking at the arc covered by the wipers, it seems to be around 135 degrees. That's around the arc covered by the rear wiper on my Xterra!
Volkswagen Jetta wiper motors seem to be very cheap. It's not hard to make new mounts or longer linkages so I'm wondering exactly why the international wiper motors are so expensive. It's not as though the amount of glass being wiped is particularly massive.
Right now I'm thinking about it.