Ablative Panels for reusable Space Capsule

Assuming a reusable space casule was being designed today, say as the
CTV for the ISS. In order to make the capsule reusable, the heatshield
would be bolted on, easily removed after reentry. The sides of the
capsule would have thinner bolt on plates of the same ablative
material.

My question is: What kinds of ablative material do we have now that
could be used on a modern day capsule, using the above scenario? Would
the ablative plates on the sides of the capsule require some kind of
protection from both liftoff and the tempature extremes of LEO (Apollo
had aluminized Mylar on the sides)?