You've already attracted them, you just don't realize it.
The problem is a lot of people frown on younger women being with older men so they assume you're not interested, or hide their interest to avoid being ridiculed.
You should try making the first move, so they know it's OK. If you're one of those girls obsessed with guys doing everything for her don't worry, as soon as they know you like older guys they'll take over. Let other girls know this/
I'm guessing you like older guys because they're more mature right? Well they prefer girls more of their age cause they're more mature. Also, older guys aren't that much into inexperienced women, unless they're inexperienced themselves.