Depending on how much tip is left, you can splice it back together if the blank is hollow. There is not much action between the tip and last guide so the splice wont really impede the action however, it will add a little bit of weight to the tip. This way, you will maintain the working length of the rod which wil in turn, protect the action of the main curve. I have successfully done this on an old Loomis for a mate. You need to get your hands on some graphite stick to suit the ID of the tip and ensure you leave approx. 30mm either side of the snap line. Only use 24 hour epoxy for the glue up. You can clean dwon surplus epoxy with metho.
Or, buy a new rod.
Cheers