Molex has 83 hits on '2.54 mm IDT 7 circuits. Surely you can find someone who
sells them. Beware that Molex IDT is the kind that requires a special tool ($$$)
not an ordinary press.

http://www.molex.com/cgi-bin/bv/molex/jsp/products/listview.jsp?
query=idt+7+circuits+2.54+mm&path=&offset=&channel=Products&sType=a

I happen to know that such connectors (female on cable) can be pushed onto
ordinary 2.54 mm pin header rows. At least once.

Peter P.

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