As part of my sister's 40th present, I found out what was the no1 single on the day she was born and then bought the original 45 single off ebay. It only cost a few quid-like I say it was only part of a number of pressies, but it's an idea.
Make your own ..... When I was 21 one of my penniless friends got an empty wine bottle and inside wrote a letter to me about all the good times we'd had. You could maybe adapt it....