Kitbashing some misters of mute (sos)

So I have some female custodes a friend of mine kitbashed for me a while ago and I wanna try the opposite for some sisters of silence (misters of mute if you will) but I'm stumped as to what kits/3rd party bits would pair well with the sisters (yes i know i'll need to do alotta sculpting/greenstuff, and that they are supposed to be all female but screw the lore i find think it's a fun idea)

What are your thoughts and any suggestions on how to go about doing it