Yeah we discussed this a while back. I think it would be a good conversion, probably easiest to convert a Saiga .223 rifle or something similar. .223 mags should work but it probably needs a new follower.
http://www.gunco.net/forums/f244/6-8spc-conversion-thoughts-41484/
http://www.gunco.net/forums/f244/6-8spc-conversion-thoughts-41484/