Where is all the inbetween sustainable clothing?

I am searching for sustainable clothing options as I need a new skirt and jacket, but there is a gap the green fashion out there is either comfy casual or chic flooncy and way beyond my budget, come on I know I will find it out there somewhere ..... maybe it will take some more time, a year or so! What we need is affordable sustainable fashion, not just for those with the cash. Maybe I'll have to make it myself but I am trying to break that cycle as a treat for my birthday, bring on the second hand goodies they never let me down.