Jamara modelltechnik (
www.jamara.de) do a 32mm one-which equates to 1.25", in plastic, in several colours. Best nr 171269 Jamara stuff is available in the UK. 2-piece, with front cone retained by two small self tappers, and spinner is clamped by prop washer-ie it has a frontplate rather than a backplate, with the prop locating behind the frontplate. Diameter of my example 31.5mm, overall length 31.2mm
'ffkiwi'