waterproof double sided adhesive tape that will bond to plastic and rough surfaces. Dont get the foam type, that often separates. Hunt Amazon - 3M or Scotch or Gorilla to name a few (I've used gorilla with great success)
https://www.amazon.com.au/dp/B01M7VCYFA?tag=mbn0c-22&ascsubtag=UUtbUdUnU77439YYw&geniuslink=true
Been a long time, and I know a lot of folks didn't like these, but these were my favorite skates back in the day. Saw a pair in my size and grabbed em for outdoor skates. Brand new, still with og Millennium wheels lol
This is where the term custom gets muddy. The latter isn't really custom. It's a retail skate that's put through a better, more advanced baking process.