Hi James,
Am not far from you, just up the road near Horsham. As the owner of both a Sandcast and a K6, both brought back to the UK from Latin America, I would be interested to know whether you are intending to perform the restoration of your die cast yourself or do you plan to let someone else wield the spanners (sorry, wrenches for our cousins across the Atlantic!). Both my bikes have been sat in storage, along with many others, since being shipped a couple of years ago and I am waking up to the realisation that I may never have the time (and almost certainly not the technical capability) to perform all of the resto works myself - so if you know of a reliable mechanic in the Sussex area who I could entrust my Honda's to, please let me know!!
Good luck with the restoration - presume you will be in the future, if not already, an impoverished customer of David Silver!!??
Cheers!
Richard