MC33390 and HIP7020AB seem to be available from utsource.net.
I was not precise using word "available". Of course we can buy obsolete parts from china. But I consider buying obsolete parts only for repair. J1850 itself looks obsolete, but it's another story.
Did you think about the emulation of the J1850 VPW protocol?
Did you think that someone who thinks about emulation of the J1850 VPW protocol most probably already read first page of google search result?
Anyway this is an offtopic, don't you think?