Found Galil AR mag adapters!!!

http://www.triggeraction.com/galil-223-ar-mag-adapter-century-arms-caspian-receiver-p-10659.html

http://www.mississippiautoarms.com/index.php?main_page=product_info&cPath=138&products_id=454&zenid=2o80ho5sgv1u7d2p4ki24hfkv2

both for about $150

Not sure why this is a surprise, there are 3 different makers represented over at the Saiga forum (http://forum.saiga-12.com)