Lets make a long story short:
went to the j-yard. Said: Massa wanna have 2 volvo 440 wiper arms. Left and right. Got them. Installed them (direct bolt on) and used champion x53 wipers on them.
result? :
http://www.lahe.net/diff/alfa-wipers/
It seems that the year doesn't matter. as lon as you get the arms that have bosh printed on them. In general the new wipers will wipe about 1 inch less from the top of the windscreen than the originals, but I dont mind.
Overall cost of the mod:
2 arms 11,5 eur
2 x53 -s 16,1 eur
Total 27.6 eur.
Used tools 13 mm wrench ;-)