Found this one as well, with more than 10 available.
Hooker Headers BH23104 Blackheart Shorty Headers | eBay
Saw a post on FB where a guy said he order some back in January and finally got them. He said he had to sign an off road only waver, and then said they were back ordered but that they would update him monthly, which they did. The really weird thing (to me) is he said they were shipped direct from Holley.
Maybe they are going to re-introduce them? But for off road use only?