I haven’t, but I could. When we were looking at them originally, this box was the best balance of packing size and quantity of ammunition.
I could look at doing at 1030, I don’t think it would be too difficult.
But it’s the same length, just under an inch narrower and a quarter inch thicker. It didn’t seem to offer a benefit, especially with the 50 rounds less capacity.
I also don’t have a case to test it with. So at least the first one would be more expensive.