Doc's Pro-Plugs are a good deal. Get the vented ones. And get a backup pair for when you -inevitably- lose your original pair.
I've got some manky exostosis going on too. Best thing I do is preventative maintenance: every month or so put a few drops of Swim Ear in your ears. Let it get down in there by lying on your side so it will drain into your ear. Work it around in there by pulling on your ear and rubbing around :> This breaks up the wax. Then flush it out with a bulb irrigator (from the drug store) filled with warm (not hot) water. This flushes out any wax buildup and lets your ear drain. This is important b/c with exostosis your ear canal is smaller and dosn't drain well now. You want to avoid the viscious cycle of exostosis/infections that just leads to more stenosis (shrinkage) of the outer ear canal...which in turn leads to MORE infections and exostosis. Keep your ears clean...
Oh yeah: don't use Q-tips - they just push wax down farther into the ear. This impacted wax makes drainage worse. Which makes infections likely.
My ten cents.