I have a formally 9' 3wt that I built, it exploded at the but end of the tip over but connection last year....

I would like to repair it and have trimmed off the split end and now, obviously have two parts that no longer fit...can I install a spigot ferrule?

What material can be used?

Fiberglass, or does it have to be graphite and aprox how long should the ferrule be?