Wing mirrors I'm not sure, I haven't ever seen the inside of one. The problem usually is that there will be a number of clips or mounting tabs within the mirror case, manufacturing those wont be easy in CF I myself wouldn't know how to get round this other than wrapping the original part which usually takes hours to get the finish acceptable at best. Due to the amount of time to make a pair this would make them very expensive. I will go and have a butchers at one now and see if I could make a clip over CF skin.
The B pillars in contrast are relatively straight forward, I would use a fabricated metal piece laminated into the back of the part to attach to the car. Making a number of these would warrant buying a high quality CNC'd mold which is too expensive for 1 off's as you can imagine. The one above was made in an almost sacrificial mold, only get a couple out of it before its knackered.
I will have tiered pricing soon for 5 ply pre preg carbon fibre B pillars which will be perfect replicas of the OEM ones in every way. I will warn you now it wont be cheap if there isn't significant interest! The tooling costs are rediculous and I have to buy this in, but shared between 10 to 20 buyers will relieve the pain.
A bit of a side issue, does anyone have an offside OEM B pillar trim going spare? I will return it or buy it! The paint finish must be almost flawless as this will be used to create a 3D solid model from using a laser scanner, this can then be used to design the mold. Once the design is done it then be CNC machined in MDF or model board.