I'm sure you can find PLCC removers, but Amiga Kit sells them as well if you need. I purchased one from them with my MegIChip. Makes things real easy.
He has a MiniMegaChip that has a surface mounted Agnus, not a socketed Agnus that can be removed with a PLCC remover. He should just send it to someone that can remove it and replace it with a socket if the socket will fit on the board then he can install and remove/replace what ever Agnus he wants to use any time.