I found these online. No luck finding the ones for the other episodes, which is a shame, since the first one is particularly fanservice-heavy and I'd love to see whatever production sketches there were for that one.
Regardless, I'll keep looking for them.

Who would've thought Yohko's grandma would be so hot?

I saw the pic and thought, "No way Devil Hunter Yohko!?" I need to find that series again, I haven't seen it since back in the day it came out! ^_^ Thanks for jogging that memory!

Base +9