I use an old Shoe Box that I’ve cut a couple of U-Shaped Holes on both ends and some Duct Tape to reinforce it.

I like it because it’s sturdy enough to hold the Ship and also won’t damage the wood while I put the Ship upside down on it. (Like I’m doing here).

Also it’s disposable and doesn’t cost any money like those Foam or Clamp type Holders you see on Micro Mark, etc…