Here is a trick. The primary goal is vibration damping, secondary impact resistance.
Remember the old egg drop in a protective container science class experiment? Well this is a good way to mount and protect the expensive reciever. The softer the foam the better and DO NOT OVER COMPRESS THE FOAM when mounting. Stiff or compressed foam will transfer vibration and shock and won't be helpfull. I use recycled electronic (computer ) shipping foam. Its free just call around.

Cut a block of foam as wide as the fuselage and as long as will fit in between other gear. notch out for switches etc. Slice down the middle 1/2 to 2/3 through the foam block. Carve out a pocket for the RX. Insert the Rx with all servo and battery plugged in. Insert the block.
Your done. It will survive a full power face plant.

Another method is wrap as previously shown and glue a velcro strap to the floor of the fuse. Wrap velcro around the foam/rx package (not to tightly). Easy to remove as needed.