Just exactly what are you looking for? Do you want some Remington 222 mag brass that has been necked up to 6x47? How much do you need?
The only brass with the 6x47 head stamp is the match Federal nickel that is hard to find.
You can make it out of any 222 magnum brass. The old Herter's was the best.
Do you have a tight neck chamber and need it turned?
I have some different stuff but it would help if I knew what and how much you wanted?
PM me if you want.