I'll be happy to give them a once over and as long as you cover the postage, there would be no cost if they are not repairable.
Missing parts from P38 fobs are usually either battery terminals, timing crystals or passive immo coils, all of which can be repaired or replaced. Depending on the amount of damage (physical / water damage etc).
Post a few pics of them if you like and I can let you know more.