is there a plugin that saves players blueprints on a force wipe ?
No blueprint wipe
Forced wipes do not wipe blueprints. if for some reason you have them deleted it's either a host issue or you do it somehow. To restore blueprints anyways, do a copy file named "player.blueprints.4.db" or something like that from the server\YourServerIdentityFolder\ and make a copy of this file, then should be ok. If you wanna restore the blueprints, do it when your server is stopped or will glitch the server as hell when players try to craft something. Only used to delete this file when wiping bp's but I guess can be used as restoring too because there's saved the bp info.
Are you saying that bp's don't wipe on regular server settings?