For more information and to purchase online:

Seasons 1 & 2:
http://www.amazon.com/exec/obidos/ASIN/B0009K8LCA/ref=nosim/happydaysonline3-20

Season 3:
http://www.amazon.com/exec/obidos/ASIN/B000BO0KNM/ref=nosim/happydaysonline3-20