1. Pin info- http://www.allaboutpins.com/softenamel.html    
  2. 100 (1in) pins at $2.63 each = $263
  3.  : (1.25in) : $2.70 each = $270
  4.  : (2in) : $3.39 each = $339

https://www.thestudio.com/custom-accessories/lapel-pins/             seems like a better option. More quantity choices