Just go to amazon.com and search RV Table Leg. 3 different tube lengths available and the sleeve for the floor and table bottom, each purchased separately. Looks like about $35 for all 3 pieces.
2011 Jayco X19H (purchased 2015)
2008 Jayco 1007 PUP (purchased new, traded for the X19)
2012 Chev Traverse LT with TP