Chervil in SEA?
Sosio's in Pike Place Market will sell it by the box as they don't normally stock it. They need at least 24 hrs notice. I forget what I paid for one a couple years ago. It does turn up in some groceries in the section with fresh herbs in plastic cartons. I've seen it at Uwajimaya and Metropolitan Market. But it's not consistently in stock anywhere I've seen it.