I saw red wheat 5# bags on Amazon for ~10$ I believe you sprout them and juice them up. I'll check my health food/grocery store and see what they sell the bulk for.
Nutritionally, I'd expect that to be about as good as it gets, certainly better than powder.
dx w/inoperable brain tumor 9/12, so nutrition is vital. Dedicated to slaying this beast.
"Keep on swimming" Nemo