This isn't a standard pin and socket connector that you find at most retail places (heck, even Radio Shack still carries the 0.093" series at some stores). The pin and socket connectors are industry standard and both AMP (Tyco Electronics) and Molex (Waldom Electronics) make a fully compatible series. I've seen such connectors from others too, including JST and possibly even Foxconn, 3M, Hirose, and FCI. Such compatible connectors are not unheard of at all, and you can actually find cross reference lists that will identify which connector series from which manufacturers can be mated, are 100% alike, etc., at least for the more common types.
As another example, the ATX power connector is a 4.2mm AMP PE series, but Molex also makes a compatible series marketed under the name "Mini-Fit Jr.". Molex insists it's a 4.19mm connector, but if you look, both connectors are actually 0.165" pitch, and they don't agree on how to round. Ah, the joys of identifying and buying connectors...
AMP and Molex both make TONS of connectors that you will never find at retail, and in fact many are hard to purchase in small quantity at all.
The biggest thing I'm recognizing with this connector is the retension clip design. It's pretty distinctive, and I've only ever seen it before on the JST YL series, and the contact housing area looks similar, too. I'm asking for the contact pitch to see if it is possibly a compatible series. AMP also tends to organize their connectors by pitch, so that also makes it easy to start looking through the giant list of connector series made by AMP.