Questmead, but not sure they stock them.
Mine was seized last year. Bolt undid from thread but would not budge through tube sleeve. Applied heat to try and free it but no luck.
Ended up having to cut through sleeve & bolt to remove.
REAR AP
Bolt - # CP3439-110
Tube Sleeve - # CP5144-144
Helicoil for bolt (# CP3439-110) - # CP3714-116 (M8 x 1.25)
Copper grease new bolt generously prior to fitting inside new sleeve.
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