Hi:
I don't have an extra 13/16 but if you may need I have a 15/16 SVS30 with no marks and hard to tell from new for $35 a 5/8 SVS20 in the same condition for $25 and an older VS20 underlined mark with initials on one end but otherwise nice clean used for $15. If you have any interest I can post pictures and figure shipping.
Thanks, Larry