Source for 27" Wheels with Hooked Rims?

When riding my mid 70s Dawes Galaxy last week, my rear tire popped out of the rim. I wasn't running terribly high pressure - about 60psi - but my rim is slightly out of round and won't get any rounder. I'm planning on taking it on a multi day ride next month, so I'm thinking a new wheel might be in order. And, if I'm going to be getting a new wheel I might as well get one with hooked rims.

So... can anyone recommend a source for 27" wheels with hooked rims?

I'm seeing some WheelMaster wheels on amazon, but it looks like they have a reputation for bustin' spokes. Are there other suggestions for new wheels?

I'd also consider buying a donor bike, but I don't know when hooked rims came into vogue.

I'd also consider moving to 700c if that is going to make sourcing easier.