I understand that, but you're making the assumption that there are only a few Fae realms that have access to larger amounts of Elementum. I would think that since it is described as a Fae metal it will be found in most Fae realms. I also think people are forgetting something that Richter has been told multiple times which is that he has had good fortune rained down on him. Portals are not common in the Land he just lucked into finding a settlement that had a connection to the Tefonim and there is no reason that any portal they had to Fae was permanent or was permanently assigned to Fae. It could be something like a Stargate where it wasn't always opened and you had to program your destination everytime you opened it. If that were the case then just because the Portal might still exist doesn't mean he can get it to work, but considering the limitations on his Portal knowledge I doubt that a stable portal of any flavor to Fae will be found in MV. That being said there is always the possibility.