AccentsandPetals on ArtFire. They create gorgeous flowers by carefully shaving rescued wood for each wonderful petal. I have fond memories of my grand dad out in the barn with curlicues coming from his hand plane. They can make a wide variety of flowers, so if you don't see your favorite, send them a photo and they will work botanical magic.
Facebook and find their other shop on zibbet. More examples of possible bouquets, pomanders, centerpieces, corsages, and boutonnieres are found on their blog. A tutorial on building your own bouquet from an assortment of their flowers looks easy to follow, and allows you to add a personal touch. They are willing and able to make your special requests, just contact them with your ideas.
Bringing exposure to wonderful artisans whose shops have gone unnoticed or under appreciated.