Well, you could
1) Start a new game, get the pommel in Irenicus'
2) Export the character with the pommel
3) Go to your game, drop a party member to get an extra slot.
4) Copy the game to multi-player
5) Import the character with the pommel into the open slot.
6) Take the pommel off them, exit, drop them, save.
7) Copy the game back to single-player and re-add the dropped player.