So I removed the broken bit from the frame, used another axle I had with a QR lever and the banshee end cap on the other end. The hanger is sandwiched between hub and frame, located by the axle and shape interfacing with dropout. Ridden twice and hasn't exploded, happy days. Thanks to everyone contributing here, I now know what to buy but there's no rush as I can ride it as is. Marking found.
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