Well some good news Big Bolt in IL can make them for $58.74 ea, this does not inclued shipping ;-)
Another CO Mega Metric can make them for $72.78 ea, this does not inclued shipping ;-)
It's a start, now we know where to get them ;-)
I don't know if this one will work, don't know if it's strong like a grade 8 ;-)
M10-1.5 x 280mm CL 12.9 DIN 912 Plain Socket Head Cap Screw | Fastenal