I don't know where you live - but in the Northeast you can go to most any local grain mill (or Agway)- and get "uncertified" rye or winter wheat.Uncertified means that it is locally combined - usually for feed - and it likely has some weed seeds mixed in. Its faily cheap and 50 lb bags run less than $20.00 and will plant 1/2 acre. You want Whole Seed, not cracked.

Find out where your local farmers take or send their combined harvest - and thats where you go.

FH