I'd like to thank everyone for the invaluable information. I recently purchased a 1066 and it's only coming with one magazine. I started compiling my parts list and placed an order with GPC tonight. I know I paid a little more for a couple of items than at Midway but they don't ship to Canada and GPC does. I looked at using a 4013 base plate catch but those are out of stock at GPC too.

It looks like I'll do an order for items that Midway has at great prices and have them shipped to a firm just over the border. I'll post up some photos when I get mine assembled.