Lost CIE pass (in a taxi on Good Friday)

I took a taxi from Aston Quay to Heuston on Good Friday around lunchtime. I think I dropped a CIE pass which has my name and photo and on it. It would therefore be worthless to anyone else but it would be very difficult for me to replace. The taxi was a cream/silver colour saloon, fairly new and very clean car. The taxi driver was a friendly Dublin guy.The pass was in a small black holder with Iaranrod Eireann written on the outside. I would really appreciate getting it back.