Squadron has tons of them. Just do a search for decals...maybe use a particular WWII aircraft for "keyword," like P-51 Mustang, or whatever you used for inspiration. 1/60 is not a very common scale (I don't know of any injection molded plastic kits in that scale), so I'd probably do a search for 1/72 scale stuff and you'll probably find something useful. If you're looking for something a little more contemporary, you can get some great stuff directly from Twobobs Aviation Graphics.
Thanks for the info Draykov, especially the link to Twobobs Aviation Graphics. It helped me figure out where to put my decals on my VF-11B FP.