UNIX PC upgrade to v 3.5 ?

[dca at toylnd.UUCP]

Some one mentioned v3.5 for the Unix PC.  Is such a beast available?
What is the upgrade policy, cost, etc (I'm currently running 3.0).
Does it improve the phone device driver that has an annoying tendency
to go west and loves to get in a mode where it chirps the disk
once a second.  A uucico that doesn't continually get hung would be
nice also.  Is it any closer to a full SYS V rel 2 (a real SYS V
curses perhaps?).  Any and all info would be appreciated.
Thanx in advance.

David Albrecht