A pink Joe Waugh - first build ever

Do you know what brakes she's put on there? I'm trying to find some suitable decent ones for the drop (50mm) that I can get for under £20 for the pair but can only find this sort of thing new. There doesn't seem to be many of the Shimano 105 ones I posted above around on ebay.

Her Joe was custom build for someone, very small, but a very long top tube (54cm), hence the handlebar choice to fit her better.

The brakes are short reach on it, but the Shimano you've found are plentiful enough, are you certain it's 50mm? have you got a spare brakes you can put on it to see the clearance?

There is a single pivot one that go down to 51mm called the Dia-Compe BRS200 if you want a classic looking brakeset.