Reckon it'd be worth picking up a pair of these? http://www.clasohlson.com/uk/Bluetooth Radio Ear Defenders/Pr409983001#moreinfo
Probably not good for 2-way comms, but maybe not bad for 1-way and a helmet to suit?
Sorry to hear you can't make use of this any more.
Is it still for sale? If so, would it be suitable for a complete newbie at around 95kg, and what would I need to know about 4-stroke (i.e. versus 2-stroke)?