Reply To: Which wiper blade/ arm replacement can I obtain for my 33 mk 2?

[39Schuss]

Not sure this answers your request. On my 33 (#483) I only change the wiper blades, not the arm laying between the motor axis and the blade.
Blades are 40 cm long (15 inches) and are attached to the arm through an extremely standard clipping part, so extremely standanrd that in French supermarket this is the only clip found for not recent cars.
3 years ago I bough some expensive ones made of stainless steel but with very poor rubber quality. A year after I moved to cheaper supermarket type, much cheaper though rust stains invaded the window and the varnish under it, easily cured with owalic acid.
Nowadays I keep the metalic stanless steal part and interchange the rubber part, a very easy task.

Back in 2011 I found the part around one axis a bit loose. I removed the arm, wrapped the axis with very thin steel (ss), mounted the arm with 6 female sides (called BTR) and the trick was done.

WD40 is not entirely satisfactory to protect metal, WD stands for water dispersant, not for metal greasing. I clean with WD40 and then use petroleum jelly.