Earth Station - what model Dometic fridge do you have? You can get the parts numbers for that rather nifty device from the Dometic website but its easier with the model number of the fridge.
I attached the parts lists for one fridge that appears to have that (see pages 7 and 8). The part number to the longer one is 2007337138, the shorter one is 2007337187 and the clips are 2930693045.
DW, 3 Kids and our Goldens
2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD