I can't find them anywhere

They're in Star Wars: Droids: The Adventures of R2-D2 and C-3PO .

I don't think I've seen them in stock for a while now, maybe more than a year. I see some on eBay, fwiw.

There are several items for Armada that have been out of stock for months to a year or more. The Reb I and Imp I fighter squadrons were notoriously out of stock until March of this year. Give FFG where credit is due, they made plenty and they are still in stock in most places. Here's hoping that they make some more of all the OOS items once the SSD drops.

I managed to pick up at my Lgs last month an Imperial Light Cruiser too! Mind you, it was the last one. Haven’t seen a Chimera in a while either.

I have four ... perhaps it's time to sell some...