hi guys, 
was wondering how trim clips are made? 
are they part of a two piece mold, or are they made using a separate type of mold (e,g vacuum form or silicone mold) and then stuck onto the carbon fiber part?

looks like an over moulded part that press forms the skin then with a suitable material moulds the clips on the back, we have the kit at work but the tooling costs are high as matthieu says due to all the intricacies involved with sliding bolsters and small geometry.

This is where skinning of OEM parts work well as you dont have to worry about how to attach then back onto the car.