Hello,
my name is Liliana, i have over ten years of experience as a designer, and what i like most is to illustrate, that's why i like this project.
Please, visit my portfolio https://www.freelancer.com/u/webpolis.html
to see some of the illustrations and designs i made, in order to evaluate my work.
I can send you more samples, if you want to.
I use Illustrator for this kind of projects, i can deliver you the images as vector format ready to print on the t-shirts as any size you need.
.
I found this project really enjoyable and interesting, and i would like to retrace the four images you have in detail as vectors, wih the same lines, colors and style, so you can have the same images but as vector format to print.
Hope we can work together, please, contact me if you want to talk about the project, or if you want to see some more of my work.
Best regards.
Lili.