30 Jan 2021, 18:36

Hi Jeremiah! Your work is amazing btw. I saw your post here and I've just started working on a children's book as well. Long story short, I did a bunch of research ahead of time because I wanted to find a POD publisher with good reviews and low minimums. I opted to do 11" x 8.5" and they do have a landscape version it that size (not too far off what you've created). The company is called Lulu xPress (https://xpress.lulu.com/pricing), I haven't seen the quality in person but they had pretty good reviews from what I could find.
Hope this helps!