Does anyone know if the G8N-1S would do? it is still available. It is listed as a "low voltage" version but has appx the same characteristics apart from coil resistance of 180 Ohm against 225 Ohm and a pull voltage of 6.5V as against 7.2V.
An alternative looks like the CIT A16.
ref
Electronic Components: PCB Overview
and
www.citswitch.com/Relay%20Cross%20Reference.pdf
Cheers,
Michael.