I didn't find this doing a quick search of the forums, and I suspect I missed it in the book... but I've checked a few times:
Where do I find prices for the Military-grade armor enhancements from Arsenal page 51?
Some look like they are essentially cyberware systems, and I could use those... but what about Mobility and some of the others that don't reference cyberware? I don't see it in the Armor chapter, and I don't see it in the errata... where am I missing it?