Woah. STOP. IF you're into Rockabilly, Vintage, 50's and that sorta stuff, go see Artilleri after you've been in Sand Shack. It's in the same sim and it's the ultimate shop for those themes. Ok ok, you're too lazy to walk, so go here, you lazy bums. Do I have to do everything for you??!
Necklace: ID Lanyard CHIC (Alidar Moxie) It requires some editing (hours if you're a clutz like me) to get it to fit, so make a copy first and then have fun! Add your own pic and background :D
Shirt: Baseball Jersey Red Dog Gear (Ruff Zepp) The shirt is free and comes in all layers. Yes, free. You know you want it.