Dpends on the year of your brother-in-law's Heritage..Some had decals on the tanks and others had actual emblems. the kit you are speaking of is a 1994 and the kit decals are spot on, I have several of the kits and the actual bike. If you need decals,, printing them would be the way to go,,try looking the web for an image of the bike and then download it. I have made HD emblems by cobbling up a master and then foil copying it. On one I used a diecast and copied the emblem that way. It is tedious and takes practice and more than a few trys,,but it can be done. Another source may be to look at some of the other kits available including the Ford trucks with the Harley emblems,,some of those may work
Good luck!