"...like a 10 shot mag..." No such thing. If there were, it'd have to be pinned to 5.
If you have a newer rifle with the centre feed type system then Sharp Shooter Supply has a kit that may work.
http://www.sharpshootersupply.com/
Break the link, what's the difference between listing the companies name and posting a link to their site, I'm saving the OP 2 mins. from going to a search engine and finding it himself.
If one of the supporting companies carried said product I would obviously suggest looking/buying from them as I completely support canadian companies. However since none of them do I can't see it hurting thier business.
My friend bought that one - it's not that good... Really hard to insert/remove.