How did you/what is damaged on the receiver? There are a few receivers and receiver/transmitter combos on usedconcretepumps.com website.

Depends on build date of the complete system and its application. Receivers and transmitters can be repaired, modified and recoded by the right technician who has knowhow and parts available. The trouble is sometimes the companies they work for refuse to repair or modify old units for liability and warranty reasons. Keep in mind also, depending on how bad its damaged the cost sometimes of a repair when you factor fiddly labor and parts isn't too far of just buying a new complete system.