 Katzman's archive of more than 100 live Hüsker Dü shows was used as the main source of the 2017 rarities collection "Savage Young Dü".Katzman played a vital part in the independent record stores that supported the Twin Cities underground music scene, working at Oar Folkjokeopus Records starting at the dawn of the punk era in 1976, and in 1985 founding his own store, Garage D’Or Records, which he later expanded into a record label.Garage D'Or released several CDs archiving live shows by seminal punk and New Wave-era Minneapolis bands, including the Suburbs' "High Fidelity Boys - Live 1979" and the Suicide Commandos' "The Legendary KQRS Concert 1976".