These may still fit a variety of free standing cymbal displays. The base of the round arm is 5/1'6 across where it mounts in the hole or slot of a display rack. These still have nice rubber mounts where the cymbal rests and can hold up to a 22" cymbal easily and should be able to do 24" cymbal as well.
Factory-refurbished 18" Thin Crash/Ride Cymbal Sabian SR2 Series cymbals are a great way to add quality cymbals to your acoustic drum kit at a great price. SR2 Series cymbals are refurbished by Sabian at their factory - they take used cymbals from their AA, HH, AAX, HHX, and Vault Series, re-finish them at the factory, and re-label them as SR Series.