[rfranzq]

There seems to be a two part answer.
1. Phone numbers in the places you go.
2. Forwarding of those numbers.
Is this only or primarily Europe?
Does Toggle forward? They would seem to have the European numbers taken care of.

Perhaps a 85-95% solution is possible and a 100% solution is not.
Get as many countries as possible, and the high hanging fruit will
just not be. Or at least not easily and soon.

I suspect there are some cost limits.
Would Piranha be a good first step?

Perhaps if others [not me--I am talking beyond my knowledge here] could know which countries you need they would see an answer better.