Bob Dylan, check Entertainment Earth....they got the clean 4-packs in stock.
I was under the impression that they are all done that way, but you should be able to swap the arms to change the poses.
Jessevader08, you only get one set of arms for each clone trooper in your 4-pack. So you can only display him in one pose. But if you buy extra 4-packs, you might get lucky and get the other 4-pack to come with the different arms.
For example....you buy a Battle Damaged 4-pack....and you get in it:
501st with short blaster
White Clone with short blaster
Utapa Clone with rifle
Coruscant Clone with rifle
Then another 4-pack might come with the opposite version of each of those.....like.....
501st with rifle
White Clone with rifle
Utapa Clone with short blaster
Coruscant Clone with short blaster
I didn't have any luck.....I got no Gree and my BD and clean 4-packs had the same dang arm combinations.
(This bummed me out and I sold both 4-packs)...not sure if I will buy them again.