I use combination of those air soft helmet pads and bicycle helmet pads as well. the bicycle pad has a perfect shaped one for your nose area. But i have also ussed the foam that comes with 3d printer as well in other buckets.
Got to help a fellow future TK from my garrison. It went well and got all his biceps forearms and thighs pretty much ready for him to cover strip. And I might add he had a DDD kit and that armor is amazing.
Welcome brotha. Fellow shadow here as well. I found that Ukswrath build thread on the spec ops forums was very helpful in my build process. Good luck on the build.