Opening a new topic as related topics are quite old...
I was looking for a stronger and a bit longer strut for my "Kombi". As there is officially no stronger replacement part for the original Monroe ML5772, I did some measurements, calculations and spend a long time browsing supplier data. I bought several struts that were supposed to work, but then turned out to be too long/short or too strong. Many measurements needed to fit: size when closed, size opened, stroke, strength, diameter, connectors etc.
Then I found the excellent replacement part: JOHNS 71419591 (650N, original =585N, and it opens a little more though should be same).
For one year now I have been testing this one. From -25 to +30 degrees and I am very happy with this model. At severe cold it still needs little help, but normal -10 ish it is ok. Also in summer it is fine. I found a 720N model too powerful, besides the fact that is was too short - I still remember that last part well...
I thought I would share this with the forum members, as the colder temperatures will be with us soon 
, sicherlich besser als die Schäfer-Federn.