As Vref itself provides a 30% margin over stall speed, I have always been quite comfortable to fly this speed, with no additives, as a final approach speed when landing in a tailwind. Sometimes I think pilots forget how much 30% of something like 100 knots equates to as a margin when they start adding another 10 or 15 for mum and the kids, then fly another 5 or 10 faster than that anyway.
Although not recommended to take a tailwind into a marginal runway, there are places in the world where the strips are one-way only. Some types e.g. DC3, F27 and that lovely old thing the DH 114, are quite tolerant of even lower approach speeds, down to about 1.2 X stall, and this is what I would fly (did frequently fly) on to short one-way strips with a tailwind in the types mentioned. However, for contemporary transport types, and particularly jets, going below 1.3 Vs on final approach is a no-no because it strays outside the recommended envelope and there are all sorts of monitoring devices that would dob you in, if the F/O didn't. Then again, I hope I don't ever have to fly a jet to the types of strips I mention above!
I believe that an old Boeing manual from the 737-200 era may contain advice to fly only Vref in a tailwind, but can't quote it.