If you absolutely must have a Hellwin, and you can afford it, you will have search Reverb, eBay, Guitar Center used, etc., all the time. Save your search on Reverb, and that way you’ll at least get an email if one comes up for sale.
You’ll have to be extremely diligent, as lots of people are looking for them and they will most likely sell fast. There aren’t many left out there that people want to get rid of. And because of all of those reasons, they will be expensive. Several thousand dollars.