rubber snubbers in '74 Duster. Where to find?

I found an adjustable pinion snubber at Mancini Racing but I still can't find the rubber snubbers that are attached to the underside of the floor just above the axle tubes. I imagine that with the stock pinion snubber these are there to keep the axle tubes from moving too much if there is some unequal loading. I still need them since my originals are torn. Mancini didn't have them nor did PST, Justsuspensions or Dantes. Any thoughts guys?