I went to the Stafford classic bike show and found a rear mudguard/fender for £5 which cleaned up well, had tabs underneath to attach the wiring and fitted perfectly! I have managed to fit the light and hide the wiring under the mudguard.
I was loaned the single seat but it's time to give it back so after a lot of internet searching for the right seat for the bike I settled on a pattern Police seat from Motorworks, no bargains to be had here, but it is very well padded and hopefully will be comfortable on long journeys!
I am struggling to find a set of 4 indicators that look the part, most modern ones look too modern and will not look right next to the old rear light, old indicators are far too big and when I do find some that look ok they cost £50 for 2!! My search continues......