TShirtPrinting.net also offers screen printing for personalised T shirts, hooded tops, sweatshirts and workwear. The minimum quanity for personalized printing is 12. I love that you can print as little as 12 shirts. The company has over 20 years of printing experience so you know they will know what they are doing. They also carry some organic shirts.
You can explore their site or even order their free catalog.