Those shirts are so funny! I wanted to get Fred a "I Love Bitches" t-shirt, or there was a "Bitches love me". Theres another one that says "Tough Guy" too! I think that's SO cute!
If you guys are still looking for some, they have a lot of cute ones here:
http://www.ruffruffandmeow.com/dog_clothes/
I would recommend eBay too! Cheap and cute.