Hello there,
I have read your requirements and understood what you exactly want to do.
I can build your website that will allow its visitors to add images onto a T Shirt. do you want any ecommerce option to sell t-shirt?
I am experienced in html,css,cms and php5 and have developed wide range of website in elance
please check the link to know my works
https://www.elance.com/s/softwaresols/10183#backurl=aHR0cHM6Ly93d3cuZWxhbmNlLmNvbS9yL2NvbnRyYWN0b3JzL3Etc29mdHdhcmVzb2xzLw==
Hope to hear from you soon.
Thank you
Amit