Well your voice is not alone - lot’s of people already asked for Fairphone in the #unitedstates. Fairphone even had plans to do so with the FP2, but they weren’t realized because of trade certificate troubles.
The Fairphone 2 is not produced anymore so it is very unlikely this will happen for it, but it might happen for the FP3, which will likely come out relatively soon.
Sidenote: Clear black cases were only available for a while, because they broke fast. Fairphone hasn’t yet found transparent material that fulfills their needs (durable and sustainable).