You can also get them at:
205 West Mission Ave.
Escondido, CA 92025
I believe this restaurant is affiliated with the one at the swap meet. No offense to the swap meet (which is a really interesting place on many levels, especially around Christmas time!), BUT......
El Tejate is nice little restaurant with booths and long tables for families or larger groups. My wife and I ate there last week and enjoyed ourselves immensly. The owners are super cool and took the time to explain how they prepare their food Estilo Oaxaqueno. They serve chapulines, cesina, pure de frijol negro, mole oaxaqueno, aguas frescas, etc. etc etc........... damn, now I made myself hungry! This place is definitely worth a try.