publish/subscribe in SAP PI 7.1/7.3

Looking for the publish/subscribe concept in SAP PI 7.1 or 7.3.

I am working on an assignment in which one sender sends the data to three different recievers.  It might be same data or different data at recievers level.

We can do it normal PI based interface, but let us suppose at that specific time one of the reciever was unexpectedly down and not able to send the data to that reciever.  But the remaining two recievers got the data.

So for the third reciever, i need to send the data manually later after the third reciever is up.

To avoid manual work,  is there any concept like publish subscribe at PI level and the messages can handle automatically.

If yes please let me know the procedure, how i can proceed????

Need urgent help.

Thanks in advance.....