Atavera , who made that sign , has a repository on MTS. It's not easy to locate , so here is the link.
http://www.modthesims.info/download.php?t=213739 the sign you want is in post 4 of the comments section , "Neon shop signs real brands". While you are there please check out his other items , particularly his musical stuff , he was an awesome creator and a great contributor to sims gaming. Happy new year!