Hiya. Had one of these which I acquired from Wymondley sub-station, couldn't find it though: https://www.ebay.co.uk/itm/275146960647?hash=item4010096f07:g:C9EAAOSwSTVgtVdm Was planning to use it as a door stop too.
It's 10 years since I last saw it, it was in a box on top of a filling cabinet at what was my mum's house.
Indeed, it is seriously rare, couldn't find another one on ebay or anywhere else. Though I do wonder if they did any other darts players, would love to get a Ted "The Count" Hankey or a Cliff Lazarenko to go with it.