I bought these from Amazon. The larger 5" wheels do raise the grill like an inch or so......but they roll over small stuff SOO much nicer than the tiny OG casters. Plus (in my head anyway) a little extra air gap under the grill keeps it off the ground, and may inhibit rust just a little bit better.

https://www.amazon.com/gp/product/B08374LX6F/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1