What ever happened to Mateus and I think the white was Vino Verde same type of bottle. You never see them anymore.
Maybe you can call the manufacturer and find out? Or see if they have a website and send an email.
We can still buy it here in Alberta so it must still be made.
Actually, it is from Portugal, not Spain. You might wish to check this out.
Here is a link that might be useful: Mateus wine