You can use the BA shaders in Maya with MtoA. The BA shaders are Arnold shaders, so you can use them anywhere that you use Arnold.

Here’s how:

• Download the Maya mental ray package of the BA shaders. For example, for Maya 2014, the most recent version is
  >>>v25.01.09 Maya 2014 mentalRay
• Extract the archive. For example, you could extract the archive to a C:\solidangle\BA folder.
• Set MAYA_SCRIPT_PATH to point to the scripts\AEtemplates folder. For example:

  set MAYA_SCRIPT_PATH=C:\solidangle\BA\140219__baEssential_25.01.09___Maya_2014_MRay\scripts\AETemplates

• Download the Arnold shaders. For example, for Maya 2014, the most recent version is >>>v25.01.09 Arnold 4.1 (mentalRay addon required for UI)
• Extract the archive, and set ARNOLD_PLUGIN_PATH to point to the Arnold\win64 folder. For example:

  set ARNOLD_PLUGIN_PATH=C:\solidangle\BA\140219__baEssential_25.01.09___All_Arnold_4_1_3\Arnold\win64

• Start Maya. The BA shaders should be available, and the AE should look “nice” for the BA shaders.