Is there any RPC package for System V ?

[C. V. R. Murthy]

Hello,
        Thanks for replying my earlier query regarding streams on Unix System
V.
As I mentioned in that post, I am trying to port RPC package developed on BSD
Unix to the AT&T Unix System V.
I would like to know if such a package already exists, if so any references.
Thanks in advance,
Murthy (cm36 at ANDREW.CMU.EDU)