I want to repair some powered armour (the VOID suit from Red Horse) but I'm struggling. I have the options to "mend simple apparel" and "mend simple weapon" but that's it. The simpler clothing from various RH mods shows up under there, so I'm assuming it's compatible. Some googling tells me I should have the options to "mend complex apparel" and "mend complex weapons" (and that's how you repair powered armour) but they aren't showing up.
Any suggestions?

(I am fully aware I play with far too many mods and that is almost certainly the cause.)