Add Different Note to Multiple Parents at Once

I know there's a feature to add the SAME note to multiple parents at once, but sometimes we want to share a note that is slightly different for each parent. (i.e. sharing a coupon code... every parent gets a different one.) It'd be great if there was a way to add a different note for each parent, but all on the same page instead of going into each parent's account. OR even better would be a way to upload a spreadsheet of notes! That would be a great feature for other account details, too. :-) Thanks!