Not aware of a source in Coos Bay. However, you should check at your local garden centers/nurseries as they may have a supply. Make sure the worms are the right species - Eisenia fetida.
You can also get them online and places like the following:
- Three Trees Farm - Cottage Grove OR
- The Underground Worm Connection - Central Point OR
Here's a helpful OSU Extension publication - Composting with Worms EM 9034.https://catalog.extension.oregonstate.edu/em9034