That Klotzli knife looks great!
You may be able to find a Rod Olson knife within the parameters you set. Possibly a 3.5" Gemini? All his knives seem to use a button lock, and the one I have (M9 Custom) is outstanding but smaller than what you specified.
Maybe a Spyderco Amalgam would meet your criteria, if you can ignore the flipper tab because it also has the Spydiehole for an alternate opening mechanism. The compression lock is great, but who knows when this one will actually be released.
I'd rather persuade you to broaden your criteria so you could consider something like a Koenig Arius – recently available again and openable without using the flipper tab – the Sander Barbus – optional opening with the blade fuller, and very much on par with Shirogorov for a lower price – or a Holt Specter, if you can find one. Amazing quality and function for the price.