Watermelons WITH seeds?

I love watermelon, but those seedless ones in the store are poor replicas. Does anyone know where to purchase a watermelon WITH seeds? In my opinion, no seeds, no flavor.

Used to be a pickup parked on Webster Street in San Francisco that sold them in the summer. Unfortunately, that kind man passed away. Haven't been able to find watermelon with seeds since then. Anyone know of a place? Thanks.