For my daughter's MacBook (13in.), I just ordered a
Capdase from Vinko's Treasures on eBay. It's made in two versions: ultraclear and antiglare. Vinko's was listing both kinds for the Macbook Pro, but only the ultraclear for the MacBook. I bought the ultraclear, and wrote him a note wishing for the antiglare version in the MacBook size. Guess what? He has it and allowed me to switch!
I'll let you all know how it works out, if my daughter lets me apply it. If she doesn't, I'll order the ultraclear and ask her to sell the unused antiglare film to a fellower MacBook user.
Incidentally, Vinko's ships from Hong Kong and delivers by Registered Mail; someone must be home (or next-door) to sign for it.