Well, not exactly those corporate gift type that just anyhow
print on any ol' t-shirt. A professional t-shirt printer or
manufacturer.
Some conditions :-
- Custom tag allowed
- Good quality
- Good prints
- Not only front/back/sleeve printing but possibly graphics
crossing from front to back by the side etc...
- No min qty or maybe allow small run
- Reasonable price of course 
For future reference 
If anyone know any custom t-shirt makers, can also PM me or post
here. Thanks!