Need a STL edited to be split into 2

i have got a STL file which I want to print at 200%, however as I have a bambu x1c, and 200% takes it too big for the printer, so I need to be able to split the print into 2, so it fits on the bambu printer, but also goes together with no seam visible it needs to be strong so a hidden join system to allow it to be glued together and remain strong as it'll be hanging as part of a oversized model I am making.

please could you quote to do this and produce 2 high quality STL files from the high quality one I will supply. i need this completed ASAP