You'll have a problem in that it's a long way to where rice is grown. Arkansas are the closest growing fields to TN, (and they are probably totally under water this week.)
Finding someone that will bag and ship them is going to really add the cost.
Could you substitute a more local product?
(I would suggest corn gluten meal, something readily available locally, but it's a germination supressant in that it accelerates growth excessively according to an old website from Iowa.)
Wheat straw.... is available.
And there are lots of food additives from the Farmers' Co-op. (Soy bean meal, cottonseed meal....)

Susan, you might consider buying some BioComp from Sonnegro instead. It's made with composted bark and peanut hulls.

Thanks, that sounds good.
In the past I got 50 pound bags of the hulls in Milwaukee, WI, so I know places have them and may not advertise the fact. I'll try the Sonnegro, thanks!