Moose sources theirs from Electrex. It's Electrex that supposedly isn't making them anymore. There have been reports of them still being available on some parts store's shelves.
Talk to/check out rickystator.com He will either rewind yours, or maybe has some for sale/exchange? Just did. He does have a 65W coil available.
BTW, the labeling on the Electrex coils I've seen have two different wattage ratings on different packaging. One of 'em says 65W, one says 70W. Somebody is being optimistic, it seems.