That looks like a DHL get-lost fee. They want to say they offer it, but don’t want to do it. There are professional carries phone numbers, and if they don’t use L5, the numbers are in the book as they say.
Two things I see Purism being responsible for:
-
Adding a caveat in the ad about additional batteries.
done. 
Yea! -
With great haste, contact professional carries like:
FedEx
United States Postal Services
With the sudden and shocking events I think it is going to, if it hasn’t already, make it much more difficult and expensive to find a backup battery.
~s