Hey there!
How many characters and how many backgrounds do you need? And could you provide reference images to show the style/feel and level of detail youre looking for? If you message me I can provide you some *watermarked* samples not available in my profile
Anyway, I could start working on this right now, just let me know!
I'm well experienced with both Photoshop and Illustrator,
having worked for many years as an art director in ad agencies
You can see samples of my stuff in my profile
Cheers!