I am having a boy in September and recently while shopping at the local outlet center, I found a great collection at the Little Me store. It's the giraffe collection and has different blues with chocolate brown. I love giraffes and the colors are different so I bought several outfits from the collection along with the matching socks. Since then, I have seen the same collection (just not all the pieces) at Babies-R-Us.
As someone else posted, Carter's has some different choices also. They have a set out right now that says "Mommy's Little Monster" and has these little dino-like monsters on it that I think is so cute so I had to get that too.
I have found some cute things at The Children's Place, although their current newborn boy's layette is kind of ugly.
Gymboree has some cute things. They are pricier, but I look for the discounted stuff. I recently bought some outfits there with whales on them.
Also, have you tried ebay? Or do you have a Burlington Coat Factory near you? An outlet center?
Find fashions you like.
Look at the tag, you will find an RN number or a W (something don't remember.. I am old)
Type the RN number into google
It will tell you the manufacturer. Then contact them about wholesalers for their fashions.
If google doesn't work then go here