Advice on where to purchase rice cheaply is off-topic. I believe there’s a tips-n-tricks post coming, can you delete and re-post there?
Outside of living organisms viruses only survive for a few hours. Ordering packaged food and waiting a few hours before handling it should be pretty safe.
Theoretically the virus might survive in animal products like meat for longer time, just go vegetarian if you want to be on the safe side.
If possible ask them to leave the package outside your front door and wait a few hours before you take it in.
Coronaviruses may survive a lot longer, depending on specifics.
Coronavirus appears to be incredibly long-lived on surfaces: https://roamresearch.com/#/app/AcesoUnderGlass/page/-vaRHd8jL