Search of a Preprocessor-mesher for a Deformable-FEA simulation.

[dcagritan]

Dear all,
I'm in search of a preprocessor that could provide me with a mesh with 9-node brick elements that have been used in the current version of Chrono. Right now, as far as I see, the current implementation is capable of generating a mesh for a rectangular domain. However, I'd like to have the flexibility to mesh a domain with varying soil height. Could you please recommend me a preprocessor that is capable of doing that? I'd prefer open-source software, however, if there is not any, I'd be fine with a commercial one.
Thank you and Best Regards!