There was a link or someone post step-by-step instructions on making little shirts and sweaters for the little bitty ones out of nice/fancier socks. You may want to search for that. I know it sounds silly, but I remember the pictures were just adorable.
Also, there are several on here who can make something for you. I know fufufashions has great clothing (YTer's get a discount)...cute little shirts and sweaters! And others too. Good luck!
I am not certain if this is the one I was talking about, but I just found
THIS