organickingdom.com has lentil flour for $3.99,I grind my own flour, too, sometimes, in my coffee grinder. It's cheaper for me to buy the grains than the flour (I always make my own oat flour, because it's 1/3 -1/4 the price of a bag of pre-milled flour) and for some things (like red lentil flour) I only need a little bit and/or don't know where I'd buy it.
I can't eat any of the ancient wheat anymore, but I always liked spelt.
imagine they have a range, im in the uk so i wouldnt shop there