Frustrated with getting a rear spoiler

[drumbum]

hi all

so i know little about after market car installation for items such as rear spoilers.

I have never installed an after market item on a car.

I have found a nice CF rear spoiler for my 2019 370 however I dont know where to turn to to find out an installation cost. I dont want to go ahead with the purchase without having a rough idea of how much the install cost will be.

it does not require painting.

to make matters worse, the company that sells the spoiler has no idea and no guidance as to where to get it installed and what the install cost will be.

I find this rather annoying that they want to sell an item but cant be bothered to help me get the install done.

any ideas in northern california?