Just the same as magic items, there are Restricted components, which can be used in any chapter, and Local Chapter Only components, which can only be used in the local chapter. ("Restricted" basically meaning that the distribution is controlled by the treasure policy.)
The goblin stamp policy is going to be up to each individual chapter - some offer components and some don't. As far as I know, the chapters that do offer components for goblins only do LCO components for that chapter. You might be able to work out a trade with folks who play in the other chapter, though - goblin up some LCO Chapter A components and trade with a guy who has LCO Chapter B components.