It won't be possible to get anything certified. The cost would be immense (I doubt you could do it for mere thousands).
Of course, there's nothing stopping anyone from cutting labels off existing garments and transferring them, but it seems unlikely that whatever you're putting them on would look remotely the part, if it was significantly better than existing off-the-shelf garments anyway.
If I can't get hold of one of those gilets, a
mesh vest to EN1150, carefully taken in to hug the torso and minimise cross-section is what I'm going for.
You can get the one linked above in pink. I always think if you're going to look daft you should go all the way!