The LEGEND experiment, a large array of germanium detectors enriched in germanium-76, is searching for neutrinoless double beta decay. The name of the game in this rare-event search is to keep the radioactive background low: LEGEND achieves this through both analysis cuts and its active liquid argon veto. Special calibration sources are necessary in order to understand the efficiency of analysis cuts in the current LEGEND-200 experiment, as well as to pursue R&D on new cuts and technologies for the future ton-scale LEGEND-1000 experiment. I will talk about what isotopes are of interest to the LEGEND experiment, and how they might be produced here at CENPA. In particular, I will cover work the accelerator team has already done to produce a test Co-56 calibration source before moving on to discuss work that will be done to produce an Ar-42 sample.