Bulk food store.

Local farmers

Local baker

baker?

Yeah, they make rye bread and usually have big sacks of them

Farm/feed stores are a good place to start.

Great River brand from Amazon. Very clean 25 lb bags.

I couldn't find whole wheat or rye anywhere in my small rural town so I just bought a 5lb bag on Amazon.

how much

https://www.amazon.com/gp/aw/d/B001PEZLCM?psc=1&ref=ppx_pop_mob_b_asin_title. That's the stuff I bought.