I tried several types of pins and found the 22-gage wire works well. I get
the wire from capacitor leads. Some capacitors have steel leads, these make
excellent pins. (The leads can be picked up with a magnet.) You can still
use the capacitor after you trim the leads.
I wrote up how to do this for a ROM replacement for the SWTPC 6800. Look in
the Users Guide for the step by step process.
http://www.swtpc.com/mholley/ROM_Emulator/ROM_Index.htm
J.C. Wren's find of the DigiKey ED2064-ND looks good.
Michael Holley