Plunger for TOTO Aquia II

Hello everyone,

I was wondering if there were any recommendations for plungers that work with the TOTO Aquia II. The two plungers I have (OXO & Michael Graves) do not work very well. The OXO just pushes water up the side of the toilet and the Michael Graves won't even fit into the deep part of the toilet. Thanks!

Most plungers have a pull-out snout that reduces down to 2"
Leaving a little water in the bowl for a seal, and then use short quick strokers until you can see the bowl water vibrating.
Then slightly lift up a bit, and let the water suck from the bowl.

What do these plungers look like? More specifically, do you have any brand recommendations? I checked my OXO and Michael Graves and it doesn't look like they can be manipulated. Thanks.