Contact Martin Pugh.
I had to buy one after seeing his prints in person. He has developed a method for printing direct to aluminium sheet, which has lustre that looks like it is backlit. They are incredible
He has quite a few of his prints in stock here in Yass, Australia.
Looks like his shop is america only, but I would contact him directly.
Brett
https://mkt.com/martin-pugh
https://www.martinpughastrophotography.space