I believe some aftermarket outfits produce some such pieces. It does seem these days that the new 41/422/622/2206 magazines do NOT have the access hole in the floor plate of the magazine, so you must drill that to gain access to changing or even simply stripping and cleaning. I suspect that most of us find it to be a bother for a two round upgrade, but I certainly understand.
I believe the idea to move to all 10-rd capacity in a magazine obviously designed & capable of holding 12 rounds wasn't done simply to "punish the masses", but rather make it easier for the gun maker to streamline the products to be easily shippable to all of the 50 states, even the ones stiffly under communist rule. Sigh.