Why do druids even have medium armor proficiency if there is only a handful of armors they can wear in that category? Parasitic Breastplate (made of "Flesh"), Dragontouched, and Dragonscale's are the only ones I can think of.
Seriously, make some medium leather armors (Darkwood, Densewood breastplates or something), open up Brigadine, or give me a real feat please.