Okay so you know how people designs their shirts like for homecoming and ect.. does anybody know......?

Okay so ya'll know how on homecoming people designs their own shirts ... ya'll know what i mean.. right.. well does anybody know were in Dallas or Richardson , TX .. like were can they do shirts like that... cause i've heard people say its some store around Dallas or Richardson,TX but i dont know were ... or like a web-site.... other than Customink.com please someone help me out..... and please if your gonna try and act smart like well look it up in the internet dont even comment okay.. well anyways plz... help me i really do need help for this.. thanks.