The Lance OEM Pigtail seems pretty fragile -- the female pin connector has now broken out of the camper side wiring harness three times - this will be four ... I'm a little tired of buying a new pi...
There is a 9 pin connector that looks similar to the 7 pin but it will take a larger gauge wire. Check here http://www.etrailer.com/Wiring/Pollak/PK12906.htm