Did you know you can still print large items on a small scale printer. Most printers are 250mm x 250mm x 250mm in the desktop realm but that shouldnt stop you from being able to make objects up to 2 metres in length.
Give Luban a try.
Simplify upload your large file, select your build plate size and Luban will cut the model into 3D printable pieces. You even have the option to include locating pins or glue holes to ensure everything lines up.