I eventually found a dw5600c and think i got an ok deal, paying £12 for it but it was in a bit of a mess, missing 99% of its strap. The bezel looked original with a few of the usual cracks around it. The crystal has seen better days but i have seen worse. On the up note, there was just enough battery life left in it to give the light bulb a go and it worked! but that was enough to kill the battery.
So after a clean and fitting a new panasonic battery, a new CASIO band and a non Casio bezel and gasket it was ready for the draw with the rest of my collection lol.
Joking aside im wearing it now and im happy with the outcome.
Thanks for looking,