Polk R50 tweeter upgrade

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Hello all. Big Polk fan here. I do love my Polk R50 towers (rich sound) but have blown tweeters twice on them. I've never blown tweeters on any other brand speaker and the R50's are notorious for it. I also would like to improve the sound with a better tweeter. If anyone has ever seen the magnet, it's tiny. Does anyone know of an upgrade tweeter with a bigger magnet that I can just drop in with no modifications? Making sure it matches with the speaker's crossover is also a concern of mine so I'm not sure if I should even try it.