Yeah, I know what you mean. When I restored by Midget, I replaced most bolts with equivalent stainless steel ones, except in critical high-tensile applications - I certainly used stainless on the ARB mounts. Ten years on, and every single nut and bolt on the car is still sparkly new looking and comes undone easily just as if it were new - bliss!
I can't remember where I got them now, it was a company in the north of England, they were great - I started with a "starter pack" of about 10 or 15 each of all the common sizes, and re-ordered when I ran low on any particular size, it worked really well.
Also it's cool to have one of those units with little drawers in it, with the different nuts, set-screws, bolts and washers all labelled and ready for you in the right order... Well, perhaps not cool, but very satisfying to a borderline OCD case like me!
Cheers!

Some people are like Slinkies - they serve no useful purpose, but they still bring a smile to your face when you push them downstairs.