Thanks for the feedback.
Martin,
Saftek looks a good option to sort out the brake drum and re-line the shoes. I'll ask around the local VMCC members in case there's someone closer to home but that sounds a good option.
Bob,
That's a very kind offer and many thanks. In the meantime I located piston ring sets at Road and Race in Australia. Andrew at Mdina recommended them and I'm glad he did because there were none in the USA or Europe. Cost is £47 per piston which seems reasonable.
Road and Race also have tank and side panel badges and they're the only place I've seen stocking them so I've ordered a full set.
Just ordered the Mains / bevel tubes and other bits from Mdina.
Next job will be to send all the engine parts for vapour blasting. There's a company in Stratford on Avon which seem quite reasonable. I'll report back on the result.
Thanks again, Derek