Currently they use a GE product for both the wall signs and pylon signs. Send me an e-mail with the information you need I can check with my contact at Walmart to confirm what the exact type of power supply/LED is needed. Walmart is moving all there signs to LED's during there re-brand, and new stores. This also includes Sam's Club. If you do contact Sign Crafters the person to talk with is Missy Sexton.
E-Mail foo710@yahoo.com I'll try to get back to you ASAP.