GWS sells flight packs for their various planes that include everything you need for the plane, except transmitter, charger, and receiver crystal. Balsa Products in the USA was selling a set that included EVERYTHING but the charger for $69.99 recently. That sale may be over, and/or they may not ship overseas.

It sounds like you have standard full-size servos. Too big for the Tiger Moth; the wings won't support the weight. It's designed for GWS Pico servos, or servos of similar size. They're very tiny, less than 1cm wide, about 2cm long, and about 2cm high.