Roof trim om 54 plate E class

[RobbieSadr]

I have had the screen on my E-240 54 plate replaced but the screen fitter, National Windscreens, has not re-fitted the trim that runs from front to rear screen correctly. They have been back in an attempt to get it sorted but without success.
Does anyone have any clues about the best way or are there any tips so I could do this myself?

Cheers Robbie