You will find this size printer but surely it will be costly.
You can use alternative way, you can modify the solidoodle having Y carriage that is extended. You have to manage a big bed. It can be of aluminium surface and add 4 heaters under the plate. this will be controlled by 4SSR card output. the task is huge. You can can set rods 12 or 16 mm for carrying the load.
It is better not to slice the printing and then join with glue