Highly unlikely you're going to find it locally. Better off buying it from Armageddon Gear or SiCo and just paying for faster shipping (SiCo tends to ship fast in my experience, YMMV).
Although not local and not necessarily the fastest - I highly recommend Cole Tac.. Years ago before SiCo started selling, they were referring people to Cole-Tac and Dustin (believe he's the owner) is a stand up great guy and active shooter. He stands behind his products and is willing to help you if he can...