Good ol menards. $60 for a sheet.
I can get quite a few frames out of it. 4 for sure. Like I said I’ll have plenty of frames by the end of the weekend lol. I’m just cutting to get a feel for the machine. So far so good (once I remembered to set the clearance on the z-axis to 3mm, I tried .20mm and scratched the surface as the bit moved from hole to hole). Oh well live and learn.