Where to get a customized shirt in the san bruno area? **10 points best answer**?

ok i just went to mount rushmore and my cousin kept calling it mount Mushmore so i thought it would be really cute to get him a shirt that said mount Mushmore. the only problem is i dont know where in SAN BRUNO i can get that done. i have seen places at the Tan Foran mall but am not sure if you can chose the text and color.