As for the screws on the WEnfields/Albions. NO............ the Webley screws won't fit. The Enfield screws are all BA sizes so even if you can't get an original, you could make them easile - just as we had to do as apprentices!
Are you sure that Apex have all the spare parts Mark as I seem to get a lot of requests for strikers and odds and sods - such as landyard loops etc etc