Trinity Bats out of Fullerton, CA makes bats for several Dodgers, and Adrian Gonzalez has been using them for a few seasons now. He swings the PS 27:1, and according to the Trinity site, it was designed just for Gonzo.
In the photos, you can see Adrian swung a 35 INCH (!) Ash in the game, and he swung Maple in BP. We’ve never seen a 35.5 inch, so this is likely the longest bat in baseball. Its available in Maple, Ash, and Birch, in whatever length you need at the link.