I read on one of the yahoo groups that you can get custom dies for the GO. I haven't tried to get one but it might be worth calling Accuquilt and ask. This one lady had a pretty lengthy post on how she called them, gave dimensions, etc and how long it took them to make it for her. I think they charged extra for the custom dies though.
Joann's almost never has sales on the GO (I think I remember one time and even then they had limited quantities in the store). When the shops were given permission for the GO to be sold on sale, Joann's never did put their's on sale. They even exclude coupon use...