Accesory bracket and finding bolts for small block.....

[ellisjay2]

I'm buttoning up my old accessory setup on used 70s block I dropped in, had an 80s block but needed rebuild. I won't go back with a/c, so I need either the long bend curve Bracket, or this short one I snapped a pic of online, short would be better in my opinion, and I'm going back with stock exhaust manifold. It bolts right to first bolt in cylinder one. I lost my original stuff and bolts. Where would be the easiest to find bolts for mounting power steering to bracket, bolts for crank pulley...i need some shorter ones (15mm head size) and other bolts I may be missing??? My long alternator bolt to block is a hair smaller than thread hole on this one, can i just grab another size up from hardeware store same thread style??
Sorry Im having ocd moments of putting exaclty back how its suppose to be though on these I can cheat some. I also need another water pump pulley, nut for one motor mount stud, and different angle thermostat housing that points 4 o'clock ish as my old one did. This one that came with new intake manifold points straight up...


I regret loosing my bolts and all...
What's the easiest way to get old stuff like these most local part stores are 50/50...??
Temp sensors...oil pressure sensors etc....