bed strip bolts size and quantity?

[bigmoe]

The plan for my 65 short fleet is to hide the bolts that fasten the bed to the frame. I reinforced the cross channels so I can bolt them from below. So my challenge for now is that I don't need to buy a complete bolt kit, I just need the bolts for the strips and the perimeter. I'm going to try to source them (s/s polished). Any suggestion for a source? Also the main reason for this post is I need to know the two sizes and quantities for the strips and around the perimeter. (Assuming they are different?)