You could use something like Steelfish (dafont) and distress it.
You're going to be on your own there- I don't know what program you use or your skill level.
I work 90% in vector graphics and I have a distress vector I created for that purpose since I had so many customers asking for the "Old Navy" look.
DynamicGraphics has a tutorial for Illustrator although I simply scribbled on paper, scanned it and traced for outlines.
Looking for Carpediem EF Regular or something lose
Can I download it for free anywhere?
thanks.