Costume Shout-out!

So, my mum is having a 50's rock 'n' roll themed 50th party on saturday, and of course, I don't want to miss the chance to gear up and go all costumy. Alas, my wardrobe does not extend to 50s-wear, and try as I might, I can't think of alternative costumes. Besides, the idea of going as a jock to not_in_denial's Grease is just too good to pass up.

So! I'm calling out to my friends on LJ - does anyone happen to have a letterman-style jacket I can borrow for the weekend? Something in this style, perhaps? I figure at least one of my friends has to have one!