The 2 links for the jack I posted this morning were working fine, but it seems now they won't open. The company that makes the jack is WESCO in Elkhart, IN. Might do a search to find their phone number. The parts list shows that the rubber boot comes with the switch. The liquid stuff from HD works fine...and is also handy if you have any wiring with damaged insulation.
Below is the pdf file for the jack instructions with the parts list.