I'm afraid that the BoomPro won't work easily, even with an adapter. The Momentum Wireless uses a proprietary 2,5mm input with twist lock. You either need a compatible jack (probably only from Sennheiser), or remove the twist-lock guide inside the headphone input or add a twist-lock groove to a 3rd party 3,5-2,5mm input adapter. The latter 2 options are probably too much of an hassle.
Because I too was extremely disappointed with the mic quality, the solution I found was to buy the Momentum inline cable with inline mic from the on-ear Momentum 1 (the over-ear cable version is much more expensive). The inline mic is still far from being as good as the BoomPro mic, but the quality of the in-line mic is already much better than the Momentum Wireless mic, and is compatible with proprietary input.
(I have the Momentum Wireless and and the BoomPro, by the way)