The conductivites depend highly on the material properties of the materials, especially exfoliated carbon and carbon foam, because these may have very different different degrees of exfoliation and intercalation. For carbon felt there are different base materials, such as PAN or Rayon which result in different properties. I recommend downloading the technical papers provided by the manufacturing company, normally they provide all technical information you need. Else you might want to do your own measurments
You may have to build special/simple shapes and use model based eddy current techniques to measure the bulk conductivity if this is what you are after.