DATSUN A12 A14 A15 Metric Engine Bolt KitI used the above link as a guide and went down to my local
Warburtons and purchased all stainless steel items.
I got this kit all in stainless steel for $17.00.
You may as well get ARP head studs to put the head on.
As for the rest, go down to your local wreckers as ddgonzal said and scab the ones you need and clean them up on a wire wheel. Or label and bag them up as you take them from the wreckers, and go get new stainless ones for them also!