Rieco Titan 11531 EZ Swing Out Camper Jack Extension Bracket Kit - White
Atwood Manual and Electric Truck Camper Jacks
I received them with-in a few days of ordering them. I had to grind away the top corner piece that's closest to the motor to make them fit. I haven't gone on a camping trip yet. I am really happy that I can back my 2012 Ford F-450 under with the extra space. They were very easy to install.
These have worked as expected. They are slightly less stable than when the jacks were attached directly to the camper. They require the bolts that mount the jacks currently. As long as you have yours already mounted you should be all set