The only parts I made from plexiglass I redesigned to be 3D printed:
All of the files I’ve uploaded are 3D printable including the battery rails.
Standoffs are already on your machine. The whole machine is built with them. If you need more you probably need to get them online. Bolts can be ordered online if Home Depot doesn’t have the right size.
You need to cut about 0.25” (6mm) off each end of each of the three large hoop sections.
I didn’t adjust the length of the legs so the hoop is slightly oval shape. Not a big deal though.