Righto: Eyelids are $100 for the set, they are quite intricate to make because they are more three-dimensional than the other pieces so cost a bit more. Will reuse the factory mounting plate that's on top of them.
Rear taillight trim - the large piece that sits between the lights. Not sure if there's much interest in it, $250
C pillar trims - have only got quotes on the side pieces (as I'm still waiting for the top piece). It's going to be OEM-fitment and the easiest way to get it is a combination fibreglass/carbon fibre. Will be around the $400 mark for the set (as there is a lot of work to get the mounts correct).
Side vent: $250, will be a 1-piece design with a scoop for extra air-flow into the engine bay.
 
I have till the end of the week to see what interest there is and say what pieces to go ahead with. If I can't get 5 people at least interested, then the parts won't go ahead. After enough sell for me to cover the money I've personally put into this, then I will put money into a boot/modified engine bay lid and modified bonnet (which I am making at the moment).
 

Im still keen on the rear visor.

Update: delay with a resin distributor, should have the first visor ready by next weekend. I'm borrowing a car for test dithering.
Stay tuned!

This is one of the visors he made that was test fitted on my AW11