Use the JR 9411 on the ailerons, you will have to do some work here, but they fit and the JR 3421 for the Rudder, again, you will have to do some work here, but it fits and for the flaps use a standard JR servo like the JR 8411, JR 8611, something with about 100 oz of torque at 6Vs or more.

This set up is very solid.