So, I went down to the local signwriting shop today.
I have some original 1988 XR600 tank stickers. I wanted not to use the originals (who knows what the glue is like after all this time), so I got them to scan and reproduce the stickers on modern vinyl.
The reproductions are printed, not silkscreened as the originals were, but look pretty good anyhow. The red on the reproduction is a little "redder", but that is as close as they can get by printing. And seeing as how they are NLA from Honda, I'm not complaining.
The original is on top, reproduction below.