All of the versions of Blitzkrieg Commander are available in various forms:
Blitzkrieg Commander III
Hardcopy direct from ourselves - www.pendraken.co.uk
PDF through Wargame Vault - http://www.wargamevault.com/product/210130/Blitzkrieg-Commander-III
Blitzkrieg Commander II
Hard copy through Lulu, priced at £17.50 - http://www.lulu.com/shop/peter-andrew-jones/blitzkrieg-commander-ii/paperback/product-20009669.html
PDF through Wargame Vault, at £8.00 - http://www.wargamevault.com/product/210574/Blitzkrieg-Commander-II
Blitzkrieg Commander I
Hard copy through Lulu, priced at £17.50 - http://www.lulu.com/shop/peter-andrew-jones/blitzkrieg-commander/paperback/product-20009643.html