Red Dot "rear see through" lens diameter

For my action pistol handguns I prefer a 4 MOA or slightly larger red dot.  I have several UltraDot 30mm "two ring" scopes, but prefer the smaller "one ring scopes" which would include the Burris XTS135 (30mm) which is a great scope but a bit to long for my specific moving target sight base setup.

I have the Aimpoint H1 (4MOA) and H2 (6 MOA) which I like but the rear see through lens in more like 20mm and locating the dot is challenging some times.  A lot of those small red dot scopes advertise 25mm objective lens but then scale the rear see through lens down to 20mm.  Kinda defeats the purpose in my opinion and they don't note that lens size in the specifications.

Are there any decent one ring red dot scopes that are 4 MOA or larger with an actual see through lens diameter of 25mm or larger?

Thanks

Holosun 530

Uses the Aimpoint mount

But it’s a 2mm