Tektronix 4693D connection?

[hathaway at hec.arc.nasa.gov]

We have a Tektronix 4693D color printer we would like to use from
   1) a Macintosh
   2) a PC-compatible
   3) a Sun Sparcstation 1 Plus

We need to use it from ALL of the above.  The interface to the Mac and PC
seems to be fairly straightforward and we have gotten some info directly
from Tek about that.  What we don't know is how to connect to the Sun, and
would particularly like to know if we can connect to one of the four
parallel ports on the back of the Tek printer.  We understand that we may
have to upgrade the printer to what Tek calls a 4693DXN and buy a 4511
network interface.  The problem is that these boxes run around $3500 and
we are wondering if this is really needed or worth it.  I am particularly
interested if anyone has tried/needed to do this before, and if so, what
solution you came up with.

        Patti Hathaway          hathaway at hec.arc.nasa.gov