I have found the one you are looking for and others much similar at the thrift shop. Other than that try a search for Simplicity 9380, a newer version but much the same. It is out of print but you can find it easily from online sellers for about half of what a new pattern costs nowdays....really $13-$15, really. Most thrift shops have a plethora of patterns for about 25cents....I am not real Goodwill fan, they want too much for their stuff but Salvation Army, St. Vinnies, or some local charity shops are full of used patterns. You can also try the blog
www.habitual.wordpress.com for a sweet little kimono top and
www.homespun-threads for some cute kimono baby shoes. I could only upload the pdf for the top...you will have to try the web address for the shoes....