It may not be that simple. I've already written down a list of the elements we would need - but there are two factors that are going to be incredibly complicated.
the first is finding the elements in the first place. There are certain ingredients that are magical in nature - they exist only within our world to the magical community and are not typically seen by Muggles. while there is a possibility they may exist on this Earth, it is not a certain thing by any stretch of the imagination.
The second is that those ingredients that may be here may be altered in some way or form. There are dear with two heads wandering about - if I am to understand correctly. This planet deals with radiation and the associated fall-out. There is no way that the ingredients that are easily accessible have not been shifted and it is impossible to know the results of that change immediately.
The other problem is that the Wolfsbane is a poison - if not constructed very carefully it will - at best - simply not work. And at worst it may kill the wolf.
I do not say any of these things with the intention of discouraging these attempts. I will admit readily that I have been considering options myself since I became aware of the number of wolves we will be dealing with, but I think it should be very clear that it may be difficult to out-right impossible, and that any taking of it must be voluntary because even if we believe we have found a solution, it might kill the wolf in question.