The Mega Billys are from PLAT and they work fine. In terms of hooks, you can run ST-66s or ST-76s 5/0s on the 25cm model. For the 30cm model, I'd suggest you start looking at something like a Gamakatsu Recorder 7/0 or even an 8/0. if you prefer singles, its a matter of testing what you like on them. I tend to run a Baker rig these days off the belly and a single off the back.
for a Baker, you need to make sure the hooks you use have enough clearance on the sides of the popper.