The problem with relabeling is that you don't have any assurances of supply.
If there's some maco, bergger, etc. film I like, I'm going to be really pissed if it was really a roll of Agfa that there's no way for them to make more of, even if they wanted to.
This is just as true with film from "the big three". Where's my APX 25, Tech Pan, Panatomic X (not the different aerial stuff), Verichrome Pan, Kodalith, Super XX, etc.? If you think any of it is coming back you're most likely kidding yourself. Fuji is reintroducing Velvia 50, but it won't be the exact same film, and even they admit that. It may be close, it may even be better, but it WON'T be the old Velvia 50. I'm sure there are some classic Ilford films that were discontinued that will never be seen again, but I'm not familiar with their older products (although I'll put in a plug for restarting 120 SFX since that emulsion is still being made in 35mm).
The fact of the matter is that there is NO assurance of supply for any film product, and there never really was even in the heyday. Accept that things will constantly be in flux. If you like a film, and can't "live" without it, hoard several years supply. That's the best that can be done. My fridge and freezer is full of my precious hoard of discontinued film, including Tech Pan, 70mm EIR, Ektapan, Kodalith, Konica IR, Maco IR, 5x7 Portra, etc.