Just had mine supplied and fitted to 4688R by AWG in Norfolk for £370 + VAT. Green tint.
He primed the window surround in some matt black stuff, did the same to the glass, fitted the chrome surround to the glass using narrow double sided tape, fitted the corner pieces easing them to fit with narrow pliers, then used a fancy mastic gun to put a V of black mastic all around, then fitted the screen, and used masking tape to apply pressure to all 4 corners while the mastic dried. He them comes back to fill the corners under the corner trims with mastic after the screen mastic has dried.
Fit my screen only, £85.00 + VAT
He did a dry run before priming to ensure fit, and then a dry run with all the trim in place before putting the mastic on the surround.
Make sure he does not put the black primer on the screen too wide to obscure the ally VIN number plate down there.
Alex in Norfolk.