I have a Prima brand French razor that takes a very narrow DE blade 10mm wide. I also just received another French razor A La Barba from @BBS to test out. I have one blade but it is not in great shape. Anyhow @BBS and I were talking. An Injector blade can be modified to work. So today I made a simple die to stamp the 2 holes to get an Injector blade to work in these razors. I will be given my them a go sometime this weekend.