I've found 2 very nice used liners locally, one was on a flood car the owner was selling whole and the other was on a used hood. Neither seller would sell just the liner.

I thought I had run across another one but someone used a giant pry bar to prop the hood open and in the process damaged a good liner.

Searching thru some old post I saw where a member said he bought several, unfortunately he's no longer an active member.