It is going to be hard to find someone who does all self-drawn art for free. I do not know if there are any other shops that do full self-drawn so I would just go through the list in List Of Open Art Shops!
I have an art shop too and I do self-drawn free requests, but only portraits and busts because my time is limited and I’m in my last year of school.
I’m just not the best artist, I started digital semi-realism drawing 4-5 weeks ago.
If you can’t find anything here that appeals to you, I would try to check out Instagram. 