Some really good news to post here. I contacted Turbo Start batteries
https://turbostart.com/ and they informed me that they will begin selling reproduction batteries again soon. They seemed to insinuate within the next month or so. They had stopped selling due to licensing agreement negotiations. Most of their reproduction batteries are AGM, with a few wet cell batteries due to packaging issues for manufacturing. You will be able to order off of their website or by phone if you prefer.