There are places that will ship lumber if you really can’t find any locally. FIne Woodworking 10ish years ago had an article that listed several places. Another approach would be to fine some sort of woodworking club in your area and joining it. That way you could ask local fellow woodworkers where they get their wood. Another perk of belonging to a local woodworking club is that often there is good free wood or wood being sold a very good prices. Hope this helps.