If they carry the Warrior product line they may have them. p/n WAR-153. There are no off-road or speed shops anywhere near me, I didn't even bother looking locally.
If you are looking for a dealer the Warrior website is www.warriorproducts.com, otherwise you can buy them off many websites. I bought mine from www.tellico4x4.com.
Here is the direct link to the shackles you need...