After no luck tracing a second hand sunshade for a Hawke Varmint HK5134,a BBS member suggested trying Deben direct.
I emailed Deben this afternoon in the hope they may one in old stock.
Deben quickly replied with yes one left in stock and gave me a reference number to phone and order it.
This was duly done to the sum of £11 and all within 15 minutes of my initial enquiry.
So thank you Deben for a first class service.