Did you try to buy in amazon instead i found one here
Ledger Nano S they have 5 stock remaining but the other posted there they are not currenctly available but that one is open and they have remaining 5 ledger nano s..
These are in stock on Amazon for me as well, as we speak. They seem a little pricey, as though it might be a different model than what is pictured.
Have you thought about using a Trezor or a KeepKey? I've never tried a Ledger or Trezor device, but the KeepKey I've played with works pretty cool.