Large Structures

I got a 3d model being voxelized but currently the in game maximum structure size via structure blocks is 48x48x48 and if I try to spawn any larger size the server side of minecraft crashes.

So my question is:  Is there a tool, and app, or a website that will split a large structure into 48x48x48 segments and save them into multiple files so I can spawn the large structure on segment at a time in game?