IMO, there is two ways to resolve this is to wear down the pads slowly or get some brake callipers that can take 28mm wide rims and with my limited research the only I can find that would fit are the EE brakes.
OR, hear me out (no, really), there are pads that are thinner, designed for wider rims like the Shimano R55C4-1, saving you £490.
Bear in mind that these pads were aimed for their own brakes that are designed to be compatible with wider rims.
There was this option, but I didn’t understand why you buy pads that’s already half worn for the same money as a brand new set of brakes. Hence I went to buying the black prince.
OR, hear me out (no, really), there are pads that are thinner, designed for wider rims like the Shimano R55C4-1, saving you £490.
Bear in mind that these pads were aimed for their own brakes that are designed to be compatible with wider rims.