wind noise reduction for boom mike

[ X-post x 3: F^up2: alt.audio.microphones ]

Hi group(s)

I goit myself a Nokia boom headset HDB-4 to be able to pick up call while
cycling. The microphone in this headset seem to be unprotected against
wind noise (and it points straight ahead).

I wonder whether I could jury-rig a certain noise-protection to improve
it using some piece of foam.

My questions now are:

a) has anyone already done this?
b) what type of foam would I need for this
c) anything I should observe regarding form and construction of the foam?
d) any other tips/hints?

thanks and regards
Mathias