Not sure if they are any good, but Whole Foods has merguez. It is not there all the time, but I have seen it more times than not recently. I have never seen it on an OC menu at a restaurant though. I am assuming you want it to cook?
Thanks. Yes, I enjoyed a wonderful lamb/Merguez/couscous entree last evening at Marché Moderne in South Coast Plaza. It was beautifully presented in a traditional tagine and was delicious. It inspired me to try to replicate it at home...thus my search for Merguez.