Sway bar bushings & cost to replace? It it really necessary to replace them. on 2003 Volvo S60

I was informed by Volvo that my sway bar bushings are plastic and getting worn and would need to be replaced at a cost of $650.00. Is it really necessary to have them replace and who is Columbus, Ohio besides Volvo would replace for a cheaper cost?

Asked by for the 2003 Volvo S60
Ouch. I think this is because the bushings are part of the sway bar. I would get a second opinion. I suggest this shop: