id say you might get away with a regrind, but you would really have to take it into the shop and ask them.
Im sure that the heat up the bottom plate and use an impact screwdriver to remove the screws, but you do need to get them to do it, after all if they break it they owe you a new one.
Seeing as its over $300 for a brand new reel, it is worth a shot to get it ground, or even to see how much it is to cut out and put new blades in
