I bought one on Etsy...but you won't be able to get one shipped by this weekend! I didn't see any at some of the stores that usually have them (Carter's, Old Navy, etc).
gap has a really cute one right now! i bought our "reveal" shirt at gap too, but it was a spring 2012 edition so it's obviously not around now. the new one we also own is located here:
My DH found a bunch on Amazon but ended up getting one on Etsy. Its really cute, a monkey saying he has a secret. ANd the back says I'm going to be a big brother.
I made one. It was super easy. I used freezer paper and cut out the letters, ironed it on and painted it. It took about an hour. You could also just get the iron on transfers like PP suggested, which would probably be even quicker
I also made a shirt. I bought fabric markers and wrote free-hand "ONLY CHILD expiring April 2014" It turned out super cute and can't wait until we reveal it this weekend! They had plain white t-shirts at Target for $5 and I just took out the pocket. GL!
Hobby Lobby has BIG BRO, little bro, BIG SIS, little sis iron on transfers you can make your own (and not wait on shipping) then they can wear it to the hospital! or put it on a cloth bag for a big brother hospital bag of goodies for big bro! (that's what I'm doing!)
Re: Big brother shirts
Logan 10/20/2010 ~ Addison 8/26/2014
https://www.etsy.com/listing/126781392/oops-they-did-it-again-im-going-to-be-a?ref=sr_gallery_13&ga_search_query=i'm+going+to+be+a+big+sister&ga_view_type=gallery&ga_ship_to=US&ga_search_type=all
Logan 10/20/2010 ~ Addison 8/26/2014
It turned out super cute and can't wait until we reveal it this weekend! They had plain white t-shirts at Target for $5 and I just took out the pocket. GL!