Rob's link looks like the ticket for me too. Tried the Motorola AVP-1 over-the-ear earbud with the PTT button on the wire it didn't work well. Tried a different Motorala over-the-head headset model with a clip on PTT, and it was uncomfortable under the helmet and tended to move around alot. Having the PTT secured with velcro on the handlebars sounds like a good idea, at least until the wire gets caught up in something and gets pulled off or breaks the cable.
Congrats on getting your DR back Nicor.
Everything marked, everything 'membered. You wait, you'll see.