Thus far I have only found two of the cover variations.
2007 Huggins lot:
http://oct07.hugginsandscott.com/cgi...pl?itemid=5857
2008 Huggins lot:
http://jun08.hugginsandscott.com/cgi...?itemid=100611
Another large lot that has players not on the two covers above was sold on our BST:
http://www.net54baseball.com/showthr...ighlight=blank
Old Cardboard gives this as the checklist:
http://www.oldcardboard.com/o/notebo...eries-list.asp
but this is likely short a few, like Cobb.
To add to the confusion, these images were also used on a scorecard and perhaps elsewhere, so it will be difficult to fully piece things together. I am going to try to classify a few different types in the post that I am (very slowly) working on.
If you like 'em, then I say go after 'em! You may never know if you have complete a set, but it would be fun. I have been looking for a nice Cobb with little success.