OK ... let me get this straight --- you want a 4ft long rod, to put in a rod holder, & troll cranks with it ?? What kinda sneaky secret kind of hooey are you trying to pull, Dongotto Rofl
Have you considered cutting down a 5-6ft rod & replacing the tip ?
Have you considered cutting a 6-8ft rod's handle off & replacing the handle ?
Have you considered using the tip half of a flyrod & putting a handle on that ?
Have you considered therapy ?? (j/k)
I'm assuming you want a Tenn style handle, for a better fit in your rod holders. You'll find them at Jann's, Acidrod, Merrick Tackle, & Mudhole. ( Google )
... cp