What about this?
60 grit and ships in one day...cheaper as well https://www.zoro.com/zoro-select-blast-media-garnet-type-60-media-grit-gar306055/i/G4775379/
60 grit and ships in one day...cheaper as well https://www.zoro.com/zoro-select-blast-media-garnet-type-60-media-grit-gar306055/i/G4775379/