After a year I finally solved my witeden 3x3x9 : r/Cubers
Super Cubic 3x3x9 UNEVEN IQ Cube - IQCUBES.COM
WitEden Roadblock I 3x3x9 Magic Cube Black_3x3x6 & Up_Cubezz.com: Professional Puzzle Store for Magic Cubes, Rubik's Cubes, Magic Cube Accessories & Other Puzzles - Powered by Cubezz
Goodplay Witeden 3X3X9 Fully Functional Speed Magic Cube Puzzle Sticker White Version I (Difficulty Level 8 Of 0)+ One Customized Cube Bag - Witeden 3X3X9 Fully Functional Speed Magic Cube Puzzle Sticker
Amazon.com: RainbowBox Unequal Edge 3x3x9 Magic Cube 3x3x9 Speed Cube Puzzle Toys for Challenge Brain Teasers : Toys & Games
WitEden 3x3x9 I Magic Cube Stickerless_3x3x6 & Up_Cubezz.com: Professional Puzzle Store for Magic Cubes, Rubik's Cubes, Magic Cube Accessories & Other Puzzles - Powered by Cubezz
Super 3x3x7 - Black Body | Other Rotational Puzzles | Puzzle Master Inc
WitEden Roadblock III 3x3x9 Magic Cube Black_3x3x6 & Up_Cubezz.com: Professional Puzzle Store for Magic Cubes, Rubik's Cubes, Magic Cube Accessories & Other Puzzles - Powered by Cubezz