I would vote for a Tunisia module for CMFI. One that covers Operation Torch from November 1942. There doesn't appear to be many vehicles to add. Terrain and structures for southern Tunisia might require some work. Maybe this can be adapted from CMSF. Based on what has been done in previous MODS, it appears possible.
Two modules may be needed, depending on the development time. One for the United States and one Common Wealth forces. The U.S module would cover the Kasserine Pass battles, the El Guettar battle, and the final advance on Bizerte. The U.K. module would add the initial race for Tunis actions, the defense of Thala and Sbiba, the Medenine battles, and the final advance on Tunis. I would even want to include the French contributions, but that may be asking for too much.