Boy London Elvis T Shirt. Kitsch Vintage Punk Rock 77 Rebel Original 1980s

Here we have an Elvis Rebel t shirt purchased from the Kings Road London in 1981 by me.
I believe I bought this from BOY although having done some brief research and reading I cannot find it listed as a BOY item.
Maybe someone with a better knowledge of street fashion can throw some light on this?
But yeah, it definitely came from a shop in the Kings Road and I most certainly went to BOY shopping that day - so