[eddy8men]

hi fella's
i had the same problem and came up with what to me was the perfect solution. i have used them several times and they worked great.
below is the post i originally did on another forum which explains a little bit more about it.

the time is drawing close to when the carrier and other vehicles will be ready to go on the road which got me thinking about comms between driver and commander and owing to the fact that i wouldn't want to pay for a working wartime set in all the vehicles i thought i had better come up with another alternative which after a quick search on ebay i did. i decided to use existing afv headsets as they are obviously made for the job and combine them with a motorbike walkie talkie set with open helmet headsets, after an hour of fiddling both sets had been converted and work very well and look just like the originals, unlike the original they also have the benefit of wireless comms which is great when the vehicle is being guided from someone on the ground also when not in use you can disconnect the headsets and take the walkitalkie with you if you were at a show for those urgent messages back to base ie. red or brown sauce.
if you search on ebay for "clansman headsets" you should be able to get 2 for under £20 delivered. search for "motorbike intercom" for the walkie talkie and headset which is only limited by your budget i of course went for the cheapest which was £60 delivered it had a stated range of 3 miles (my arse) but that is more like 300m with buildings and trees so if you wanted to use it at something like beltring you might want to go for a better spec (i would).
the job of fitting the new headsets into the old clansman sets was easy and i've posted some pics for anyone that fancies a go at it.
first strip out the earphone that contains the mike boom and strip out the old wiring and earpiece and mike. the only hard bit is the ally threaded lug that holds the mike to the earpiece i used a hacksaw to cut it off and you should be left with the pieces in the first pic.
then drill out the holes to enable the mike and jack plug to pass through their holes. the jack plug goes through the hole to the back where the existing cable came in from, then fix the mike to the inside of the earpiece and push the mike through and silicon the mike from the inside to make it water tight.
the new speaker fits nicely into the old earpiece and can go back on it's original fittings. where the jack plug comes through the headset i used the old rubber bung from the original cable to seal it up again but this will need to be cut and glued back into place and that's it. there is no external difference from the original and it works great and cost under £80 for the 2 and if you liked to you can have upto 20 headsets linked although that would be some big arse afv you'd be driving to fit that many people in