You should have no problem printing the LR3 core at that size.
To print the YZ plates, you’ll have to print them in sections and glue them back together.
https://www.printables.com/model/558554-lowrider-3-cnc-yz-plates-for-smaller-3d-printer-be
I used this model to print my YZ plates and joined them back together with some epoxy. Once assembled, my first project after cutting the strut plates, was to cut a set of 1/2" MDF YZ plates as backups in case the printed plates ever failed.