you need this:
-a power screwdriver
-griptape or really rough sanding paper
-fine motor skills
now you need something like an axle that you can stick on the screwdriver. this axle should preferably have a thread going through the whole
axle, so you can mount a nut from both sides for the wheel not to spin. turn on the screwdriver and sand the wheel down slowly until it has the size you want. it's basically a low budget turning lathe.
it definetely works, i witnessed someone do it to a set of 55mm down to 53s and it seemed to be alright. never attempted to do it myself, though.
or you can try and swap it with someone who got wheels that are too small for his liking. just lurk at a bowl or something, some dude might have gotten wheels that are too small for his liking so you can offer him a trade.