I don't believe that there is a recipe for fishing pole beyond the lebethron one.
The only higher level poles I've seen are the Rohirric version (+8) that you can get from the Rep barter vendors in Rohan.
It's bind on aquire, so you have to have the Rohan rep to get it.
[B][COLOR=#ff0000]Loriandrel 85 Elf Hunter[/COLOR]--[/B][B][COLOR=#0000ff]Loriandra 85 Woman Champion[/COLOR][/B][B]--[/B][B][COLOR=#ffd700]Lorrawyn 68 Elf Rune-keeper[/COLOR][/B][B]--
[COLOR=#ff8c00]Lorrell 55 Woman Warden [/COLOR][COLOR=#800080]Lorieth 53 Woman Lore-master[/COLOR]--[COLOR=#008000]Lorifindel 33 Elf Guardian---[/COLOR]Dwarrowdelf[/B]