Why not have the owner of the MG do it? As a Post Sample, it's either already in a dealer/manufacturer's inventory or belongs to a PD. The trouble with Posties is transferring them to another dealer, you can't do that without one of their local PDs giving them a letter stating they want a demo of that model MG. There is no other provision for transferring them between dealers, except temporary ones for repair and such. Destruction, since there is no gun to return, would qualify? If the owner can't do it, the only alternative would be to have a local guy do the job while the owner is present, no transfer.
What model MG is it?