Groceteria.com

Now includes the suburbs and goes up to 2005:
http://www.groceteria.com/place/new-york/buffalo/

Small update. Lockport now goes through 2015:

https://www.groceteria.com/place/new-yo ... /lockport/

Of note: Buffalo is probably the largest city in the US to never have had an Albertsons, Kroger, or Safeway presence.