Dunno bout Megaman, but ami2 or HLJ don't have either Goku SS3, Vegeta or Trunks, as those are exclusive items in Japan. And only available via Tamashii.
a comment from Derringer, of bluefin, posted on another toy board:
IF you want to continue seeing the mega man and dragon ball figures in the states, YOU MUST ORDER THEM FROM AMERICAN RETAILERS, such as amazon.com, entertainment earth, Sideshow toys, and Big Bad toystore. Bandai is watching sales of those two lines VERY CLOSELY at those specific retailers, and the continuation of those lines as american supported releases relies SOLEY on those shops.
Yes, you can get them faster if you order from HLJ, and amiami, but you can get them cheaper if you wait, and the lines MAY BE DISCONTINUED without The support of american webshops.
for those of you that don't know, Blufin is the importer responsible for getting these lines out of discontinued/Tamashi webshop exclusive only status, and into the US stores.