You might know some of the following, but I don't know what you know, so here goes.
Poodle Rescues associated with Poodle Clubs often rescue Poodles from shelters, one of the reasons they are difficult to find. Look up the American Poodle Club for clubs that have rescues. They will email a list to you.
You can also purchase one from a Poodle show breeder. Last time I looked Standards weren't as popular as toys, if interested, not because they aren't healthy and special. It seems everyone wants a toy now. You can also locate breeders near you from the American Poodle Club.
Be prepared for some ridiculous requirements from some of the Poodle rescues, but you can try. Sometimes, it's easier to purchase from a show breeder as long as you owned a Poodle previously. They won't sell to anyone who has not had one. There's a lot of competition, though, if you're looking for a toy.
You can go to AKC Marketplace to locate breeders there, as well.
Keep in mind health of the dogs before you buy. Inherited diseases. A rescue would not know. Some show breeders do testing.