Custom geojson map US zip codes

Has anyone found a geojson us zip code map that works with the metabase map visual? I have found several maps but have not had any luck getting it to work, some of them are too big and errors out.

It looks like the state level maps work here but I am looking for a map of the entire US. I think combining all of the state level maps would be far too big since metabase recommends using a <5MB file.

Alternatively is there a map tile server that would work for us zip codes?