Instead of requesting more flyables, why not do some research. Yeah I went and looked around and found a mod that replaces the MEinit.xml file found in C:\Program Files\Ubisoft\Eagle Dynamics\ME with an .xml file that allows you to fly all non-flyable aircraft included in Lock On (except 1).
This Mod is only available for versions of Lock On about Lock On Flaming Cliffs 1.1
This Mod includes ALL flight characteristics of the plane you have chosen to fly, but the cockpit will be of an SU-27. There may be a way to change the default cockpit to something like an F-15 or an A-10 but i haven't looked into it.