I was introduced to another great source for metric bolts here in MA -
https://www.belmetric.com/I had gone to
https://www.boltdepot.com/Default.aspx this past weekend to get some new hardware for my front and rear shocks. They (Bolt Depot) had the hardware for the front shocks, but didn't have the hardware for the rear shocks (lower mounts). They gave me the specs for the bolts, and suggested I call Belmetric in Tyngsboro, MA.
After making a couple calls to Nisstec and SPC to confirm the specs, I called Belmetric, got the model numbers for the flanged bolts and nut for the rear shock lower mounts, and made the purchase.
For 2 Fine Thread Flange Bolt 10.9 Yellow Zinc bolts and nuts, the total came to $16.11. MUCH cheaper than what I wold have had to pay Nisstec or SPC after shipping and handling.