If you don't want to have to spend clusters, just edit unlockables.xtbl. If you don't know how, let me know.It may be possible. In the mean time, there is one that allows you to buy an upgrade that lets you use air dash an infinite amount of times, which is fairly close to what you're asking for.
http://www.saintsrowmods.com/forum/threads/more-superpower-upgrades.3984/
Also, having the air dash work forever as long as you have the button held down would make it so you could never use the glide ability, or at least not until you've used up all 3 of your air dashes for that jump.