Check local farmer's markets and farm feed/implement stores (ref: Yellow Pages).
Get local/county maps (Sporting Goods stores, WalMart, etc & on-line?) and drive the back roads.
Also state history museums and tourism advertisements (motel lobbies, Inter-state hiway rest areas) for historic preservation sites. Some representative URL's from TN.
www.nps.gov/grsm/planyourvisit/cadescove.htm
LBL | The Homeplace
A pix sample from 'The Home Place' below.
More pix typical of these venues at:
http://www.pbase.com/pacerr/rustic_&page=all Ol' rural buildings - B&W Photo Gallery by Pacerr at pbase.com
H2