Thanks after a couple I found this one on Amazon that fits snuggly.
http://www.guitarcenter.com/Outlaw-Effects/Outlaw-9V-DC-Power-Adapter-1399909217344.gc?cntry=us&source=4WWRWXGP&gclid=COGthM_TsdICFci1wAodCnIKiQ&kwid=productads-adid%5E172488555108-device%5Ec-plaid%5E150212004282-sku%5E1399909217344@ADL4GC-adType%5EPLA