Try Googling "ir remote control repeater diy" You will get a lot of hits.
This is one that uses a NE555 which was one of your requirements. Google is a very good place to start if you do not want to be bothered designing something from scratch or just to see the approaches others have used to solve the problem. As others have said you would get more help if you give accurate information in your question rather than saing you only want to use passive components.
Les.