Dillon said, "I hadn't planned to add to the squad before the loan deadline passed but became aware of Dean's availability this afternoon (Thursday).
"He is an exciting player who has the ability to turn a game on it's head with his skill and pace. I have known him since he was a young lad and am excited that we are able to bring him into the squad.
"This is a positive signing and a player who has played in the Championship too. I would like to thank the chairman for his support in making this deal happen."
Morgan will be in the Shots' squad for Saturday's League Two clash with Bury.
Source: Team Talk