Bushes in some regions (funny enough) can actually be refered as dust seals and oil seals , unless do you have a picture of the actual part and ill confirm what you are saying or what happened to your old ones ?
Sorry i saw this late!
If 6 and 7 are required, i don’t think Hyosung sells them anymore or makes them even though it is KAYABA that’s involved, i may have a suspicion your local guy will take your old forks and try to match up with other Kayaba parts used on other suzukis . If i’ve known Hyosung all these years , here in UK USD forks are pricy items! – So we try to fix them locally as much as we can.