If its the lead in its pretty much trashed, if its the lead out you can often unravel it and save it sometimes.
The Entwistles are made by Artec in China the same as GFS
I have a rewound 97 Affinity strat pickup here, i have changed the slugs from ceramic to A5 with a vintage stagger and correct poles for that era. I have scatterwound the pickup, its 6.2k DC resistance at 20C and Inductance of 2.1 henries, its wound to 57 specs and bang on the money. Cloth lead in and lead out wires and the eyelets replaced with brass eyelets, it has a plastic bobbin. I havent charged the magnets yet, but i do it in my lil workshop using rare earth mags and i check the gauss after each run through to make sure its bang on, i can charge them north or south facing.
I can send you the pickup, and if you like it send me the dead Entwistle, if you dont like it send it back undamaged and keep the Entwistle, or i can rewind the Entwistle for more than what its worth
I do these pups for kids with no cash, gives them a taste of a real pup without any cost other than a pickup swap or straight out $30 each, which is what it costs me to do the wind and replace the slugs and source the pickups.
I can grab a pic tomorrow if that helps, if you dont want it thats fine as well, no worries, just throwing it out there.