They are branded "hercules" mirrors
I haven't found anyone stateside that sells them
at a reasonable cost...
But I keep looking as I wouldn't mind a pair.
If you google their namesake you will find them.
they come in 3 different sizes, so be aware before you purchase.
I found them sold on ebay...
but most sellers are from europe, taiwan, israel, china, etc.
post up if you find a stateside seller that has sane prices