Give ground turkey a try if you haven't already. I did over 25 years ago and can count on one hand how many times I've bought ground beef since. Ground venison is excellent too.
Is there an Aldi near you? They seem to be well stocked up in meats (not the best but ok). Also, Aldi has high quality grass fed free range ground beef for like $5 a pound, so not too much more than regular ground beef. It comes in small packs of one pound each.