Hardus,
From the engine number you have quoted, your bike is a Mark 4 Sports - not a Dragonfly. I would suggest you join the London Douglas Motorcycle Club - their spares scheme will be able to help out with the majority of the spares you will need. The Club can be contacted through their website,
www.douglasmcc.co.uk Being a member gives you access to all Club services, including the supply of spares. The Club also stocks illustrated spare parts lists so that you can identify the parts you require. You will also receive the Club magazine - 'The New Conrod' bimonthly.
We look forward to you joining our ranks,
Regards,
Eddie.