Lost crucifax chain aviva stadium surrounding area

Can everyone please share for me. Was at Phil Collins in the Aviva Stadium last night and my partner lost a gold cross on a gold chain of his neck. We were in section block 524. We walked from the stadium straight onto Shelbourne Road where we pulled a taxi. I know its a long shot but if anyone has seen it or is offered a small gold cross can you please contact me. This holds a lot of sentimental value and can not be replaced. Thanks. This isnt the original chain but it is very similar to it. Also the chain has a bigger link on the catch.