Printing Service Mark (sm)

I have a need to find a Service Mark (sm) as a PostScript Type 1 font set(Symbol, Helvetica, etc.) I have exhausted all of my immediate resources as well as most of my external resources. I need to be able to print the (sm) in superscript, exactlyas is commonly seen with the superscript tm. The sm is a less frequently used character, but I am hoping that somebody out there may already know of a font set that includes sm or at even have some creating solutions for addressing this issue.