Berg is a genericised name for crimp-to-wire headers. The ones we bought are from Newark, made by FCI. FCI's web site (http://portal.fciconnect.com/portal/page/portal/FcicntPublic/HomePage) is great.
The connector bodies are these:
http://portal.fciconnect.com/portal/page/portal/FcicntPublic/BasicsProducttypeMenu,
specifically the PV
http://portal.fciconnect.com/portal/page/portal/FcicntPublic/PVCrimpToWireHousings
For some reason the contacts we buy, 48236-000LF don't appear as PV contacts, but are compatible and a valid part number. The PV contact part number under the PV menu seems to be 47565-002LF. Also the PV contacts come in varying grip strengths to prevent impossibility of insertion and removal for high numbers of contacts. See:
http://portal.fciconnect.com/portal/page/portal/FcicntPublic/PVCrimptoWireContacts
