Not sure if you've seen it, but here is my build thread, not as hard-core as yours but there may be some useful info in there for you. Post #34 for pics of the JimmyT skid plates and flaps, pretty sure I posted some info on the Lokari liners in there too. They suggest installation at a body shop and won't warranty them or allow returns on DIY jobs, but that wouldn't really help us stateside folks anyway. I test fitted one and it fit great, won't be that hard to install.
https://forums.pelicanparts.com/porsche-911-technical-forum/1176190-build-thread-champagne-dirt.html