Well, if it's a rainshadow......

You need to send the broken piece in to Rainshadow. They will examine the broken piece and either warranty it, replace it, etc.

From there, it goes back to whomever made your rod and they get to re-wrap a new tip, butt, etc. At your cost of the wrapping, shipping, etc.

Or, you know the person who does your rod work and much like any guide program available by rod manufacturers, you get cut a deal-eo.