You can make some of them, and those look pretty nice; I'm reluctant to change my hero's armor now because I like the pretty long lasting one I crafted for him (after using another costume) way more than his default look, but it's getting outclassed by new equipment... I wish there was a way to just equip an outfit as a costume only but have different equipment under it.
Anyway, looking at your posts, you were in Gondolia, right? There's one for Veronica that you can haggle down to fairly cheap with a little running between shopkeepers there. I've never given her anything else, actually. And you can probably craft another outfit for her and Serena already; I think that might also be the case for Erik? There's also a very good one for the hero you can get through, I believe I have the count correctly, the second easiest horse race in Gallopolis too; that's the one I used before the current one I have.