Well here is a few links hope this helps.
Engine: DLE55 from
http://www.valleyviewrc.com/Gas%20Engines.htm
Airplane:
www.extremeflight.com,
www.aero-works.net,
www.pilot-rc.com,
www.wildharerc.com
Servos: HITEC 7955 for surface and 7985 for throttle, best prices at
www.troybuiltmodels.com,
www.chiefaircraft.com
HD switches and ext:
www.troybuitmodels.com,
www.chiefaircraft.com
Batteries: Fomeco 5600 li-ion for ex and 2600 li-ion for ignition
www.fromeco.org
Regulators: Sahara regulator from fromeco
www.fromeco.org
Spinners: CF
www.azurehobbies.com,
www.chiefaircraft.com,
http://www.valleyviewrc.com/Gas%20Engines.htm
Propellers: Xoar 22x8
http://www.valleyviewrc.com/Xoar%20Propellers.htm
you can find almost all you need at Valley View, Troy and Chief. so you can save shipping cost and time.
My setup is:
Airplane: Aeroworks Extra 300 50cc Yellow.
Engine: DLE55 with Xoar 22x8
Spinner: Azure CF 3.5"
Batteries: 2600 mah li-ion with smartfly regulator and 42% products kill switch, for RX i have 5200 mah li-ion with a Sahara regulator from fromeco.
Servos: 7955 for aileron x 2, 2 x elevator, 1 x rudder, 7985 for throttle.
Servo Arms: SWD 1.5" around and 3" for rudder
Tailwheel: CarbonF from Graphtech
Radio: Futaba 10CG 2.4Ghz, the best radio for me
Rx: 6014 Futaba 14 channels 2.4Ghz