Let me know how you make out.
I ran it past my sister, who is a "graphic designer - not an illustrator" (her words). She said she had the feeling what you're looking for is going to run some serious bucks unless you're lucky enough to hook up with a talented newcomer who is willing to take it on as a 'portfolio piece.'
I asked her what she thought it might cost if somebody like a book publisher were handling the project.
She said that around here (think metro NY market so prices will probably be higher than in most places) commissioned art like the above runs around $300+ per illustration. She also mentioned that for that degree of originality, most professional illustrators will also expect to get a 'piece of the action.' What that means is some sort of royalty arrangement or a restricted use clause.
Restricted use means what it says. Say you bought the illustrations for a book and somewhere down the road Dreamworks
decided to make it into a movie. If the illustrations were used as concept art, or the look of the film closely matched the illustrations, the illustrator might be entitled to a cut. On a less esoteric level, rights might only cover a USA release. Foreign rights might need to be negotiated separately. Ditto for hardcover, second printing, paperback, graphic novel, video game, audio book (don't laugh - think cover art) yadda-yadda
...you get the picture.
So anyway, whatever you do, make sure you have a clear understanding with anybody you're working with. And if you do enter into an arrangement, get it in writing - and be sure to have a competent attorney review it before you sign.
Keep us posted.
P.S. I don't know if it's still as true today, but in the past, most publishers preferred to use their own stable of illustrators. The reason they did that was because most artists were totally clueless about how to create what was called press reproducible
artwork. Basically that meant art that was amenable to the color separation process and reproduced well on a standard 4-color press. Not all art fits into that category.
If you're planning to 'print publish' your project, do yourself a favor. See if you can find a designer or art director with publishing experience who is willing to bring you up to speed on what's involved. Most of them love to pontificate, so it shouldn't set you back more than a pizza and some beer to get a good crash course on how these things work.OK...I'm rambling, and the server I'm working on just finished updating so I'd best get back to work. Bye!