I would suggest removing and shipping only the drivers that need repair. Shipping the entire speaker is unnecessary.
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If you're inclined to give it a go, replacing the foam surrounds on your speakers is not very difficult. I did it for my old Audio Note AN/J speakers a couple of years ago following these instructions: http://www.audionote.co.uk/downloads/speaker_foam_replace.pdf
Use white speaker glue (that dries clear). One tip I learned is to play a 30 hz tone through the speaker at low volume to make sure the voice coil is not rubbing. Since the glue is slow drying it is possible to stretch the surround a bit to reposition if necessary. If you hear no rubbing, let dry and test again. Let the glue set overnight and the speakers are ready to use.
I took my time and was patient doing the first speaker. The second one took about half the time. You don't need to remove the drivers from the speaker to do the repair.