Are these recovery vehicles owned by a 'central' organization rather than by the bus company? (as used to be the case in Britain - I don't know if this is still true).
In Denmark there is Falck (similar to AA and RAC) that provide breakdown assistance, Ambulance, Fire service and 'coastguard' help and much more (including fixing your lawn mower - if you are a member).
http://www.falck.dk/
Edited to add:- (Google is your friend)
http://assist.assistancekaren.se/AK/...UsEnglish.aspx
http://assist.assistancekaren.se/AK/...t/Default.aspx