I completely understand... I use only 10 rounders in mine. I don't like the look of the oversize ones.

Here's a link to our page of 30 Carbine mags. All would be blocked to 5 rounds... http://www.aztecharmory.com/30-carbine-c-582_160.html

And here's what we have for Glock .40 mags. All would be blocked to 10 rounds (unless they are factory 10 rounders)... http://www.aztecharmory.com/40-sw-c-...67&sort=2a

Also, as with KCI, we can get just about anything, so if you find something somewhere else, just let us know and we'll see what we can do.