There are three pair of S R's currently listed on the Bay.
https://www.ebay.com/itm/VINTAGE-AN...031734?hash=item1ef09fed76:g:I9cAAOSwa3lcEQ4u
https://www.ebay.com/itm/VINTAGE-AN...031734?hash=item1ef09fed76:g:I9cAAOSwa3lcEQ4u