Hi CB90

Have you tried Dave Marles at Prestwich Model Boats?

He is an expert on this sort of thing and he fixed me up with a prop for my Proboat Blackjack recently.

Its worth giving Dave a call as he may know where you can find
one even if he has not got one in stock.

Boaty😋

Thanks for advise.

The new shaft I bought (aluminium tube & skeg with steel shaft has an aluminium dog setup) I thought it would be best to use it, otherwise it means using a normal prop on a short thread as don't have thread cutting equipment.

I looked at Cornwall MB but their sizes start at 35mm.

have you tried cornwall model boats
https://www.cornwallmodelboats.co.uk/cgi-bin/sh000001.pl?WD=dog%20propeller&PN=Radio_Active_2_Blade_Dog_Drive_GFN_Propellers%2ehtml#aMA3025DD

Why a dogged prop? Got an alignment problem? Dogged props can be very noisy physically and electronically so I usually avoid them if at all possible.👍