It appears that "italylovers", a seller on eBay who sells items from VPW has a 24 Volt coil for sale. It looks to be NOS not that new Chinese stuff that often fails.
Check it for yourself to be sure if you are interested. I have no affiliation with the seller.
http://www.ebay.com/itm/Military-24-...11e16c&vxp=mtr