You can just match it to next guide toward the tip. If it's a standard running guide it's most likely a 6. Rods can be successfully spliced with little perceptible affect on performance. In that section of blank I'd use an over sleeve made from a scrap fiberglass blank. The ID or the sleeve needs to closely match the blank taper  about 1.5" on each side of the break. The sleeve is tapered on each end, pieces are joined with epoxy adhesive. After they are set wrap over the sleeve and coat with finish. The actual process is a little more detailed. I'll look for an article to link you to. If you know another local builder with some experience you may want some assistance with the repair.  

Keeper for sure