• So I either stock up soon or will have to bin my bike?

    You'll be able to buy something that's usable for the rest of your life, but in the 40 years I've been watching the number of rim makes and models readily available at retail has shrunk dramatically as factory built wheels have taken over. That probably means, as @Cupcakes says, that eventually only a few specialist shops will keep them, and they will have to pick an extrusion from one of the huge OEMs and have batches made in retrogrouch drillings.

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