Kia Pro Ceed crossbar at Pit Stop

Hello Together, today the TÜV at the Pit Stop has been informed that I have to change the two front crossbars. As price I was called 155€ per crossbar + 95€ Installation + 50€ Set the front axle. Total gross 545€. Is this price justified? Should I rather go to the Kia workshop and ask there? The car is a little over three years old, do I claim warranty at Kia? Have seen that these crossbars on the internet for 50€ per piece to chew can I also buy them myself and have them installed by a workshop? Thank you very much for the help.