Mapping a specific set of relations only?

Hi, I’m trying to build a tile server where the map is just US state boundaries. Admin_level 4 works OK, except that there are no coastal boundaries. I’ve found that there are relations for each state that look great…if I can get them styled and shown. i.e.

[https://www.openstreetmap.org/relation/161950#map=5/36.510/-80.552&layers=C](https://www.openstreetmap.org/relation/161950#map=5/36.510/-80.552&layers=C)

Any suggestions or alternative ideas you haveto offer are greatly appreciated!

Thank you