There's a small engine repair shop on 249 in Callaway/Piney Point; "Smith's" I think; not sure of the name. It's on the left as you're heading toward Piney Point; black top driveway and a Jawn Deere sign out front;used to be anyway. Maybe they sharpen clipper bladez. PH#?? Well, I'm pretty sure the first three digits are 994.....
you can do it yourself if you have a decent stone, however, i have found that the ceramic ones last pretty long and you can get replacement cutters. Might be worth just ordering a few.