I ordered mine thru a dealer. I'm sure they could have been gotten online too. These puppies are tough, made for a Class A Motorhome. I need mine to slightly raise the frame off-weighting the suspension just enough to allow the rear end to clear the asphalt then all weight is back on the tires. No issues in two years. I have 1/2" plates welded to the frame with the skid wheel plates bolted to those. It makes a clean, replaceable mod.
2010 Cedar Creek 5th Wheel 34SATS "The Beast"
2006 Ford F350 Lariat 6.0L Diesel
2003 Harley Heritage Softail "Hogzilla"
1988 Harley Softail Custom "The Fireman"
1986 Marriage to "Wifey" (patience of a saint)