Did tis ten seconds, found the parchment on Google or possible WOTC site, then when you want to use it on roll 20, just make it the picture in a handout. The text xection can then have the obligatory "This note was just delivered to you by a brown shoed square in brown paper bag in the dead of night, there is also $20,000 dollars in the bag and a Colt Combat commander with the serial number filed off..." or whatever.