Hi Owen
I posted a little bit of the history re. these a while ago here and a link to that is : http://www.airgunbbs.com/archive/ind.../t-607526.html
I've never seen a blue dot version (they may exist of course, but I've not come across one)
The Webley Speed points were also made by Singlepoint and Pellpax were selling them off cheap - dunno if they still have any - might be worth a call though : http://m.pellpax.co.uk/optics/sport-...eed-point/1040
Regarding special mounts - the only standard fitment of the Singlepoint I know of is the Sussex Armoury AR7 and a photo of this is here : https://www.flickr.com/photos/harvey...posted-public/
Protek Supplies recently sold a boxed Cyclops sight which I would have liked myself - there is still a photo on their website, maybe they can put you in touch with the buyer if you want some more details on that?
There is a possibility I might be able to help with a SP275 shotgun sight.