A "Thank You" template?

I’m brand new here but not entirely new to Garage Sale. When processing sales in GS, I know you can send emails to a buyer reminding them about feedback, thanking them for purchasing, etc. I would like to use the data that GS has about the buyer, item sold, item number, etc. to “print” a small message to go with the item sold. You know, just a small “Thank You” insert for when they open their item. Does anyone know if this exists or can exist in GS. Or, do I have to exit out and create these in some other word processing program. Thanks for any direction someone can point me in.