It would be easier to get shorter leaf switch holders, but you could modify the ones you have too. If you cut off 1/4" (guessing from the looks of things) and drill new holes for the switch screws, you could use the ones you have (I'd probably drill then cut to make sure the holes were in the correct location). If you have a ton of buttons with this problem, you'd have to consider if your time is worth more than the money you save by modding what you have.