Printing to a HP LaserJet 3505 from OS 9

I have a HP LaserJet 3505dn color printer which I need for a mixed Apple
"os 9", "os x" environment. The cp3505dn documentation says that Apple
Classic OS is supported. However although the printer does work its
handling of duplex, envelopes and other features is not ideal. I guess
that either HP never really supported this printer or that support has
recently been dropped.

Is there a PPD file for this printer for OS 9.2.X or colorsync support?

Failing any genuine support, are there any other similar PPDs I could
use which will support this printer better than the Apple laserwriter 8
generic driver. I tried to take the 3505 PPD from an OS x system and use
it on os 9 but this did not appear to work. Can it be done? What are the
ticks? I also found out that Linux had a PPD for the 3505 for use with
CUPS. Can I use this with OS 9?