One return spring has broken on the front brake on my clunker/town bike.
Said brake is a BMX/U-brake type.
I'd just replace it with a V brake, except that the posts don't have any bits to take the return spring (no plate with holes in it). Instead, there is a removable plate with a grooved flange *above* the post. This looks to be specific to the U-brake. Two bike shop mechanics sucked teeth at it and said I'd have to find a like-for-like replacement.
Best option I can think of is to find an old BMX with similar U-brake. Anyone have other ideas?