there are actually a bunch of buttons on amazon that are about 1/5th the price, and look like they'd work (and actually look cooler IMHO), but I'm worried about the fit...

Example: https://www.amazon.com/Yakamoz-DC12V-Momentary-Button-Switch/dp/B017ILNNYS/ref=pd_bxgy_263_img_2?_encoding=UTF8&pd_rd_i=B017ILNNYS&pd_rd_r=5VJRZXWZXG4WX5NM4431&pd_rd_w=YAqql&pd_rd_wg=swWGg&psc=1&refRID=5VJRZXWZXG4WX5NM4431