Oh My God!!! Need help in DE or tristate
 

I visited Tweeters in Wilmington De today to get the quote for the installation of Panasonic CN-NVD905U on my car W209 Clk320 2003.
After they checked everything out, they gave me $1000 for install.
They said because of fiber optic cable, needs to reqire everything and need whole new speakers. Before I went to Tweeters, I had checked forum for a week and I knew there was the way to install aftermarket HU without those big job. However, they just had no idea. So I need the installer for my Panasonic CN-NVD905U on 2003 Clk320 Coupe with Bose system. Could you guys please recommend one in De or Tristate as well? Delaware and Philly will be the greatest. Thank you very much.