Hiya Gary, welcome to the darkside.....
I've just bought a sharp innova with the original galway moderator and adapter and also previously bought a Jackal Firepower from a site called www.guntrader.co.uk so thats not a bad place to have a nosey now and then. i think I.J. is most definately the guru on where to source stuff (sorry to offend any other magpies) He trawls the north wests gunshops and when he finds something of interest that he already owns/doesnt require, he posts it up here and shares it with the rest of us.
i dont have a khamsin and although i know its not like owning your own, you may borrow my firepower ANYTIME you wish. HTH