Hi there!
I can make a high quality version of this image for printing on the tee shirt, and also make the edits you require.
I can even make this into a vector, but it will look simpler and have less colours, which may be good for you to print it.
I have over 15 years design experience, and also teach visual design part time.
I have founded 3 companies and worked on websites, apps, logos, illustration, printwork, etc.
I'm highly experienced in Photoshop & Illustrator.
Please view my portfolio to see some examples of my work!
https://www.freelancer.com/u/imhobson.html