Not really any help, but S1 window lifters are Ford Fiesta mk4 electric windows.
I always felt that the wheels were a significant concern as magnesium repairs are difficult and switching to a 5 stud hub sort of defeated the point of an S1 Image wheels can make for the Morgan though apparently.
Hi Mark, I have an S1 with a faulty drivers side window lifter so my question is are any modifications needed to the mk 4 electric window regulator? I knew it was an obsolete ford item just didn't know which model...until now

I'm just ordering a 2nd hand 1 on line as seem cheep and really available.