We currently do not certify minor releases of EBS individually. We have not tested in-house with any version of R12.0. We do have R11i and R12.2 support in the works and will be available in the next release.
That being said, I suspect the cloning process for R12.0 is extremely similar to R12.1. It is possible our R12.1 toolkit will work right out of the box.
Please file an RFE for R12.0 support if this version of EBS is being seen commonly in the field.