Those are really cute! If you don't want to spend alot on flowers but you still want the flowers you can go too like Costco, they have like 2dozen roses for like $12 and they are good quality....and they have other flowers. Also, floral wholesale...those people that sell on the side of the roads for really cheap by their flowers from wholesellers. And I've gotten some really good quality flowers from Fresh & Easy...like $7 for a really nice set or flowers and they are fresh. You could get a bunch or two and cut them short, wrap nice ribbon on the bottom and BAM ...bouquet.
Good luck with whatever you choose!