Where can I find full-length sans comic dub movie fan creations?

YouTube is the primary platform for these fan-made content. Searching for terms like "Undertale comic dub full movie," "sans movie dub," or specific comic series names (e.g., "Underverse," "Glitchtale" – though the latter is an original series with dubs) will yield many results. Some creators may also have their own websites or Patreon pages.