1941 Shock Mounting Bolts - Size, Grade and Source?

[CaliforniaBorn36]

1941 Ford 1/2 Ton Pickup.

Want to verify, and check for source on front shock mount bolts. Mine are missing, but it looks like maybe a 7/16" x 1-1.2 inch carriage bolt. Would that be correct?

Should be Grade 5 or 8?

Does anyone know a source that is not a box of 50? Restoration parts houses don't list them online and big box stores do not seem to carry this size?

Thanks,

CaliforniaBorn36