If I am interpreting the pinballmedic.net chart correctly, you should be able to use another brand coil with wire size 27awg (.355mm") or greater and 750 turns.
"When substituting another brand of coil for a Zaccaria pinball coil, it is better to go down on the gauge of wire (larger diameter wire) than change the number to turns on a coil. i.e. coil calls for 27 awg wire. However, a 26 gauge wire is the more common size, then a 26 Gauge wire should be used instead of a 28 or higher gauge wire. A large diameter wire can take more current flow without heating up then a small diameter wire. "
I think it would be around 6K ohms if my math is correct, anyway, perhaps that gives you the right direction?