Crossbars don’t replace TÜV

Servus on all sides have already decided not to drive to PitStop to the Tüv (the majority advised off – thank you very much :-)) but to Tüv Hessen. 10 eur more expensive. so now I have the following lack: Rubber bearings of the front crossbars torn (crossbars damaged storage) simple question: where should I repair this? was already at Volvo: cost 200€ working time, 390€ parts so 590€ (gross) (have not calculated an axis measurement – how can it go without? ) other volvo workshop calculated 687€ gross with axis measurement – parts cost almost as much now the question: whether this can be done in a ”normal”’ workshop? the working time will be a lot cheaper. or? the parts would have to be more flexible, or? should one pay attention to crossbars on quality goods? which manufacturer should one take? what installed volvo? by which manufacturer, so what should I look for? if someone in the room would have been frank/main) would have been thankfully wrong.