Jim,You might give Glen Zook a call, seems like i remember him having those dial scales just a couple of years back. Also check in the little bitty ads in "ER", I have seen them there I know. BUTTT, as to which issue, enjoy your search.... :) But Glen, I think may be a source of the scales and if not the scales, the information where to get one.
HTHUOT 73, Tony/W5OD River House Radio