The firm Horejsi supplies many low priced accessories with we can recommend for our products, such as Hyperion Servos which are the present the reference product for F3J and F3B models!
Furthermore they can also supply Speed controllers, Brushless motors, LiPos etc. from leading companies.
You can purchase direct or from FVK at www.fvk.de.
We will gladly advise you on prices and delivery times.