Broken hub, replacement options?

I've had a pair of Phil Wood hubs for over thirty years and just noticed
some wobble in my rear tire. My bike shop (a trustworthy place) reports
that the hub is broken and they'd recommend replacement.

I don't have a high-end modern bike. It's a parts hybrid assembled in the
early seventies that includes an Allegro 531 frame, some Campagnolo gear
and a few pedestrian components that I really should get around to
replacing (Universal 61 centerpulls, that sort of thing). But my immediate
concern is a new hub.

I ride for fitness, usually not more than 12-15 miles a day, all urban
cycling on surface streets. I don't need anything fancy but don't really
want something that would be inappropriate with the upgrades I'm gradually
doing.

Would someone like to recommend something and let me know what price I'll
need to anticipate? Do I need to replace both hubs or just one?

Thanks in advance for any suggestions.

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