Hi Tom,
The Britain Club has a section in the Standard where you should place an add you should contact them. Also, when the Britains website is revamped you can check and see if they will have a section there for wanted items. I dont have this one and think it was extrememly limited in numbers produced but you should also contact the Club and see if they have any available sometimes they do, I was able to obtain my Gurkha that way. I have the contact info for the club if you need it just pm me and I'll send it to you.
All the best
Dave