I finally got the bolt kit from Fastenerguy on eBay. The fasteners were actually alot better than I expected.
Almost all of the stainless steel fasteners were graded as follows:
ISO 3506. A2 Property Class 70 is an austenitic stainless steel essentially similar to alloy 304, although it has higher mechanical property requirements - yield strength minimum = 450 MPa, and ultimate tensile strength minimum = 700 MPa.
On top of that, most of the fasterners look like they have been hand polished with a rouge polishing compound.
I won't have a chance to get the fasteners into service for awhile, but as of now, for the $90 I spent on the kit, I am thoroughly impressed.