https://source.wustl.edu/2021/07/mic...r-than-kevlar/
TLDR, the article references a lab that has managed to produce REALLY strong spider silk by using genetically-engineered bacteria. One of the possible uses is flexible armour. This reminded me that the KFS has (per canon) the ability to make resistweave that isn't quite as effective as the Morrow Project. Perhaps their 150-year-old bacteria have simply become less effective over the generations and the KFS lacks the technology to recreate the necessary genetic engineering?
IMHO, this could be a good MacGuffin for a scenario involving the KFS, the Breeders and whoever else may have access to old genetic engoneering research data (Damocles, Universities, a SCIENCE Team, etcetera?).