CNC Warrior is making these, AK-builder is selling them at a decent price.
I've been looking at this muzzle break as well for my Yugo pistol AK. You can get them from either CNC Warrior or AK-Builder:
http://ak-builder.com/index.php?dispatch=products.view&product_id=30405
http://www.cncwarrior.com/ProductDetails.asp?ProductCode=23959
http://www.cncwarrior.com/ProductDetails.asp?ProductCode=23901
They also have them for the Saiga-12:
http://www.cncwarrior.com/ProductDetails.asp?ProductCode=26248
They're not just a flash hider, but a muzzler booster. The CNC site sa