Sorry I clicked like by mistake. Try the manufacturer of the rod you have for a suitable case. I have cases from Shakespeare, Tricast, Drennan, Middy and Preston and they suit 13’ rods perfectly. Middy make a padded case for 11’ 2 piece rods so will fit a 13’. They are called Middy Xtreme series( about £20) are good value with quality zips.