More thoughts - these guys are right around the corner from me and they have the largest selection of fasteners I have ever seen for a building supply or hardware type store:
Worst comes to worst, I could just play middle man for you. They have the most impressive Grade 8 bolt selection I have ever come across.
I can relate. I spent 6 years in Germany in the '80's and my family and friends kept me sane with video tapes and music from the States.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
