Multiple Printers in a Class for Ultrix 2.2?

[Lloyd W. Taylor]

Has anyone modified the Berkeley line printer software to handle
multiple printers in a single class?  Specifically, we would like the
default system printer destination to route the output to the next
available LN03, preferably in a round-robin fashion.  

The configuration is a VAX 8810 running Ultrix 2.2.  There are three 
co-located LN03s, which as a group should be considered "lp".  We have
source code.

We're aware of BRL's mdqs, but were hoping for something simpler and
smaller.