These parts will allow you to extend the X and Y of your bed.
You will loose some Z. The reason for the loss is to get the bed above the bearings and the printer base.
Just print the needed parts. Remove the upper bed. Then clip the bearings free. Once the lower bed is removed. Line up bed extender with the old mount. Drill holes. Screw tight.
Add the bearing risers and mount on base with zip ties.
Remove timing belt from old mount. Mount timing belt and secure with printed clamp. Verify everything fits and works.
When operation is verified. Disassemble again. Cut off old mount. Reassemble.
You now have a larger printing area.
You can also purchase a mirror to fit the new larger area.