If you're dead-set on finding a single compatible 32t you might try AliBaba as a last resort since I have not seen any other offerings. I have never purchased from them nor intend to but they do offer many unusual parts not found anywhere else but no guarantee of quality. There is a chance of cannibalizing cogs from Shimano or SRAM cassettes but it gets complicated trying to find out if the cogs have the same thickness needing special spacers or is part of a riveted together cluster having different ratios and not useable as a single cog, etc., etc. Shimano's site shows exploded diagrams of their cassettes which show which cogs are single or part of a cluster Here is a list of Shimano cog thicknesses by number of speeds to compare to yours. Scroll down to "Sprocket spacing and cassette widths" https://bike.bikegremlin.com/209/bic...ear-sprockets/