Those pop up for sale but rarely. I had a set I sold a few months back. I would Google search until you locate one for sale.
Help finding a particular chess set

Patience and the search make the journey of finding one more satisfying. Hopefully you can find a set with the original coffer.

Not sure if it helps you but check thechessstore website.
Link: https://bit.ly/33abitV
You can also check with antiques.com. They have that set.

Keep an eye on eBay! You may contact the buyer, his email is still listed on antiques.com. He may guide you from where to get that set!
One up... https://www.ebay.com/itm/174405164249
Another 'Gallant Knight Contemporary Gothic Mid-Century Modern Chess Set & Box' has been listed on ebay as DJAYA: https://www.ebay.com/itm/233885895414
This is the set I have. Though it looks very similar it's NOT the really rare DJAYA set. The obvious differences are the bases (scalloped in this set, not the rare 'plain' base) and the tops of the rooks.
I do like the gallant knight version too.
Has anyone ever reconditioned a set?
I managed to find a set that the copper finish had worn off… got a little too excited and pulled the trigger without THOROUGHLY checking the photos. So while I keep looking for a set in better condition, I was considering redoing the copper plating. I had also considered changing the finish, if this is to be a “placeholder ” set…
Any thoughts?

Hi! Does anyone have any suggestions on where I can find a Djaya Contemporary Gothic chess set? I am not a collector, so I don't know where to look online; my Google searches have not been helpful. Are there any websites that may have a higher probability of success?
thanks!
jay
If anyone is still interested, I have the Djaya Gothic Set for sale. Just the pieces (in very good condition), no box. For what it's worth I will be listing them on ebay over the weekend.
Thank you
Hi! Does anyone have any suggestions on where I can find a Djaya Contemporary Gothic chess set? I am not a collector, so I don't know where to look online; my Google searches have not been helpful. Are there any websites that may have a higher probability of success?
thanks!
jay