If you've been trying to email local clubs I'd try phoning them, or just turning up. Lots of clubs have websites that they never read, the new secretary doesn't do internet or similar.
I don't think your blower is ideal, Blackgates do one, **LINK** or ex MOD radar blowers **LINK**
The latter are probably OK for a Minnie on 12v, but realy need 24 for bigger boilers. You can get 12/24 volt step up converters for not a lot on ebay