There's a set of armor or two that comes hidden as part of Ambitions, I believe. One of the possible random outcomes of "Travel to the past" or "travel to the future" with a time machine (from the inventing skill) is to come back wearing an outfit from that time period, which you can then save for future use. Or if you just want it right away, use the "unlockoutfits on" cheat BEFORE you go into CAS and it'll be under full outfits. There's also a helmet-hair to go with it, and it's recolorable.
Snickerson: a Random Legacy Challenge. There are zebras involved. Zebras.