Your bug report mainly talks about binaries in CBFS, but there is most probably also Management firmwares in the images (which are less likely to be redistributable than MRC/FSP or microcode updates).
Yes, those are stored in the FMAP regions SI_ALL, ME_RW_A and ME_RW_B that I mentioned in the bug. We're planning to replace them with zeroes as well. (For those it's actually easier since they are not directly signed by vboot.)
FMAP and CBFS are two layers of organization structures in our images, with FMAP being the top one. You can see the offsets for which FMAP section covers what with `futility dump_fmap -h <image file>`. This will show you that offsets 0x93000 and 0x108000 lie in the SI_ME section (a subsection of SI_ALL) for bios_link_mp.bin.