Reg. the inner lining, as i see it there is 2 apparent solutions:
1. buy an extra set and use the outer part to widen the original ones.
2. find a good plastic welder and slice the ones you have in the middle and fit a strip of similar plastic into the gap.
On the CF wings the is not made ears to fit the inner lining so what is achieved by the above is the inner lining resting inside the CF wing
And reg, the bumper/fender joint, you wil get a small edge on top of the bumper that is visible as it is pulled the 10mm outat the edge of the wheel arch, i have tried to capture it on these photos.