I haven't looked but I'm guessing you could buy wrappers from Etsy or somewhere (or DIY) and then just apply over the original wrapper yourself.
BTW, if you are from PA or having your wedding in PA I think that would add to the awesomeness of this favor.
I did these as shower favors by my daughter. Made my own in "word". I'm really not computer saavy either. Just had a picture of my daughter and her fiance with the date and a short thank you. There are tons of ideas on line. Then cut to fit over the existing Hershey wrapper. Super simple and very inexpensive. Only took a few hours to do 50. Good luck.
Our wedding was Saturday and the ones I found turned out great . Its not letting me post a pic for some reason.
here is the front of ours. theback said thank yo for sharing ou special day