Joe the zix guy has a home-made version of scalp med he calls "hair-muck" (I have a bottle but haven't cracked it open yet).
It's liquid beta-sis and something else (saw?) that one adds to their own bottle of 5% liquid minoxidil. 1 year supply for under $50.
He's only had it available for a month maybe? Its getting good (cosmetic) reviews.