ebay is the only place you'll find them at this point. I actually have all of those coming in the mail except bullfrag since I already have him. btw your probably never gonna find bullfrag cause hes beyond rare and I got lucky but paid an arm and a leg for him. check out my pics and youll see some of the new stuff ive added to my collection
I saw Diamondhead and Waterhazard at Amazon.com you can try there.
I have Water Hazard, Astrodactyl and Big CHill for sale check out my post
The only Ben 10 Omniverse figures that I need are Big Chill, Astrodactyl, Ghostfreak, Snare Oh and Frankenstrike
Swampfire, PM me and check out my for sale page. I have Big Chill and Astrodactyl for sale for reasonable prices
i got all the bullfrags