Though the scarcity of Amiibo has been bad, it seems a weird time to be complaining about it, when they're the most stocked they've ever been (at least in Australia).
The FE characters have been restocked for codename steam. The latest few Amiibo including the inkling triple pack are still in stores. Target's even restocking Little Mac, Villager, WFT and Captain Falcon; some of the "Raraest" little buggers to find.
Still waiting on Amiibo cards which will fix this probloem completely for those that just want the Amiibo content. It really shouldn't be difficult to pump these ones out.