The last ones I got were Molex P/N 22-01-2057 These are described as .100 K. K. Connectors. The .100 pin spacing is correct, however these connectors are just a little too "fat" to fit in the female header.
Their was an alternate version of this connector that has "locking tabs" which might actually be the correct one. I just lost the heart to keep blindly buying connectors for a P.O.S. encoder.
Having said that, I am still going to use it if you can find the right connector, so GOOD LUCK!