Finally got my USA magnets in.  These are NOS Fender Alnico 5 magnets that I found from a supplier this is stuff that has been sitting around for 20+ years, freshly cut and re-magnetized.  I have 500 pieces here ready to sell I will make a deal with you if you want more.  10 bucks for 6. 

.187 x .688 Alnico 5, just magnetized.  Flat tops no bevel

These are USA made and very very rare.