Considering that Jayco has a lifetime warranty on the lift mechanism, and I think it goes back that far (1995), did you try going to a dealer and asking for a fix? Admittedly you aren't the original owner, but they might flex a bit on that if you spin a good yarn...
2011 Jayco X19H (purchased 2015)
2008 Jayco 1007 PUP (purchased new, traded for the X19)
2012 Chev Traverse LT with TP