I called the H-D dealers in my general area looking to obtain the part numbers for the black gas tank decal (stripes) sets for the 1976 Sportster and was told by all of them that their books don't go back to 1976. Can anyone provide me with the part numbers for these decals for the peanut tank?
You can get any part numbers you want on the on-line parts websites, like this one.
I recently found a pair of decals for my 1990 Glide, but only after a LOT of searching on the internet, so be aware you may not be successful. For starters try eHarleyParts.com