Here is a hack to get JunOS (potentially others?) to work via leveraging the pseudo Entity-MIB construct from SNMP::Info

Bit nasty as you may need to ensure the MIBs required by SNMP::Info are available someone in your mibdirs

I'm not overly impressed with the output of this, and at some stage will probably see if it can be improved.

Perl into your install_dir/scripts etc…

YMMV

Cheers,

   Peter