Clevis and pin arrangements are often used in linkages and farm machinery.

I am not sure of any exact interchange, but I would not be at all surprised if a farm supply or similar hardware store had the parts to build a comparable arrangement. Hopefully out of stouter materials.

As for fitting a bushing or bushings, I suspect it could be done easily at the same time, and with the right replacement clevis, would only require drilling the pedal itself. In fact, a larger pin might wear less simply because it has a larger bearing surface.

As part of my braking upgrades, I've been playing with different setups at the wheels...maybe I should look into different setups at the pedal, too!