https://bulkfoods.com/wheat/organic-hard-wheat-kernels.html (stores long term)
https://www.lehmans.com/product/country-living-grain-mill/ (da best but expensive)
https://www.amazon.com/Victoria-GRN-101-Manual-Grinder-Hopper/dp/B00JZXCLPU/ (Adequate)
Though I’ve never purchased from them, Bulk Foods has been around a long time and has a lot of whole spices as opposed to ground so they keep longer. Just grind as needed. Store in glass jars in a dark, cool place for up to two years.
https://bulkfoods.com/herbs-spices.html