Single model #640 was available 1999-2000 (on the 2000 Retired List) and #720102 was reintroduced through Target and similar stores 2005-2008.
The Stable Feeding Gift Set #61006 and #730401 included hay bale, hay net, bucket, feedbag, feed scoop and bag of feed available 2001-2005 (not pictured in the 2001 catalog). On the 2005 Retired List.
All of these releases appear to have the same color and markings; however, the #720102 models appear to have more crisp markings and perhaps updated shading.