Just in case you can't get anywhere with Techmod, there are Operation Torch decal sets available on the market. Yellow Wings, for example, has this sheet of national insignia with the yellow ID band:
http://store.yellow-wingsdecals.com/48-049-u-s-national-insignia-nov-1942-op-torch-13-95.html
MicroScale and ROP also have sheets. I don't know if they're still in print, but a web search on "operation torch decals" returned some hits for those brands on eBay.
Good to have a backup plan, just in case.