Hi! Unfortunately we can't retrieve deleted messages, if a user chose to delete their post then we have to respect that and not dig out the contents without their permission and hand around any links that may have been inside. I also don't see a deleted post in the date range you mentioned =(
There does not appear to be any post on the 25th (deleted or not). So there's nothing that can be done. Maybe it was released on a different day? Sorry, but I can't help you any more than that. :(
