There is 2 gigantic 3D printers at 3Dfilamenta Marketspace, check it out:
1. MakerPi M4141 (Print Volume: 410 x 410 x 410 mm) , the current design is not finished yet, but email customer service they will get u same but with old design unless u wanna wait

2. Ultibot Giant (build volume of 600x600x800)

As for these two, all I can say is nr 1 have superb quality when talking about print quality.