[Heathkit] Need #40-747 coil or information

[Doug Shields]

Hello all,
    A friend has an SB-610 that he wants to change from an IF of 455KHz to
1680KHz.  The capacitor needed is easy to find.  However, I need a Heathkit
coil #40-747.  Might anyone have one of these available?  Otherwise, I
recall someone posting the specs for some of the alternate coils.  Can
anyone give me any specs on a #40-747?  Any help would be greatly
appreciated.  Thanks very much.

Doug  W4DAS