I've heard these style camber plates have "replaceable bearings"

so how does one do that? there's like 3 companies that seem to sell the same camber plate

put the car on the lift, the wheels fell to the floor on both sides! these things could not handle repeated FIA curbing

 

Those are done...cannot be fixed unless you remove all the red urethane and replace it with new urethane which will probably require a jig/tooling of some kind.

Since you are bashing FIA berms, suggest you get the 'race' version. It is all metal and has replaceable spherical bearings. The downside is they will transmit more noise/vibration/harshness into the steering wheel/chassis/seat.

 

I already have full metal on the track car now, soon as greene finishes them

I thought these things were supposed be rebuildable, I dunno how anyone could get that bearing out without destroying that urethane

 

They are rebuildable assuming that the urethane is not failed. You can replace the spherical bearing in the middle. That is the rebuildable part, not the urethane.