Best source for replacement bolts?

[johnyQ]

I'm sure that I'm not the only one who has issues with bolts on these old cars (even if they aren't breaking, its not that hard to lose one when deep into a project). I know I have come across a few bolts on the chassis that wouldn't take even close to the torque spec they were supposed to, so I'm interested in preparing for installs from now on by purchasing all new bolts first.

What is the best place to replace these, do dealers normally stock bolts or it is better to find replacements at hardware stores (only how do you match proper grades, torque specs, lenghth...).

[9240sx]

You can get almost every bolt and nut new at Nissan,Iv order some wired bolts you think they wouldnt be apply to get and they can get them.