Seems to me the best approach is to spec the Pompanette web site for the sizes and model numbers of the ones that you currently have, then take that info to the NFM folks and ask them to help you cross reference their models. Considering the investment you would be making, they should be MOST helpful.
BTW, Ed Schenk, a frequent contributor to this forum who owns a Cherubini cutter named Ladylove replaced all of his with NFM lights and loves them. You might check the archives using the search feature or look up his "owner mods" for details of his process and project.