Below is the unofficial checklist for Giant Man Series. The ones in bold are the ones I have.

Age of Apocalypse Wolverine ("Weapon X") (with Weapon X #1 and Giant Man's left foot)

Age of Apocalypse Wolverine (Scarred face Variant) (with Weapon X #1 and Giant Man's left hand)

Age of Apocalypse Sabretooth (with Astonishing X-Men #3 and Giant Man's right foot)

Ant Man (with Marvel Premiere #47 and Giant Man's right arm)

Captain Britain (with Excalibur #1 and Giant Man's right leg)

Giant-Man (the Build-a-Figure)

Kitty Pryde (with Astonishing X-Men #4 and Giant Man's upper torso & head)

Havok (with Uncanny X-Men #97 and Giant Man's left leg)

Sentry (with New Avengers #3 and Giant Man's left arm)

Sentry (bearded and long haired Variant)

Warbird (with Avengers vol. 3 #? and Giant Man's lower torso)

Thor (with Thor vol. 1 #351 and Giant Man's right hand)