The commercial bulgy's have steel reinforcements, but they are not the same as the waffle mag's. The waffles are true mil grade, and the slab sided commercial mags can still be ripped out of the gun without touching the catch...the sheet metal tab apparently is just to make you think you have a steel reinforced tab.
And yes, there are bulgy Cir 10 waffles both with and without the 2 US parts. They are expensive, but worth it. Polish steels are still available, too, and they are some of the nicest steel mags.