I was lucky enough to find this simple but effective script to import your Mari textures in to Maya in a really quick way.
It is a Python script created by Kushal Goenka.
Follow these instructions to install the script.
# This Script Automates the Process of Setting up given MARI Texture Patches
# into one Single Layered Texture in Maya.
# Copy Script to ‘\maya\2012-x64\scripts’ folder. ’2012-x64′ might by different.
# Source the Script. ( Script Editor > File > Source Script… )
# Call the Python Command: ‘Mari2Maya()’ (or add to Shelf)
# Export textures from MARI with ‘$UDIM.extension’ at the end.
# For Example: $ENTITY_$CHANNEL_$UDIM.tif >> Castle07_color_1003.tif
# 1. Drag Texture Files into Hypershade.
# 2. Drag Select all Imported Texture File Nodes in the Hypershade Work Area.
# 3. Run the Script. via ‘Mari2Maya()’ Let the Magic happen.