there's a well known butcher's called zamalik butchery in both najma and mansoura..two shops very close by..you can try them..one is straight from the small roundabout after gulf cinema going towards najma..you will see it on your right side..just before and near some big indian restaurant..and then if you turn left from the next signal and keep going towards mansoura/muntaza, you'll see another bigger zamalik shop on your right again.. and i like how you mentioned what its for..saves you loads of trouble with all the curious questions instead of answers:-)