Not that I'm aware of.
I'm willing to offer suggestions if you have some specific NPCs, however.  I'm not well-versed in 2e beyond the core 3 books, so my eyes will likely glaze over if you start talking about kits and NWPs, etc..  I did run 3e/3.5 for ~4 years, though, so I can probably shake those cobwebs loose.

If you want NPCs with class-levels, I suggest simply using equivalents present in AS&SH. Check what weapon they wield and what protective gear they wear and simply use their stats from AS&SH. If they have a high score in an attribute, assume that has a +1 modifier; if it's really high, make it +2. Levels and classes are pretty straightforward in 1E and 2E, a bit trickier in 3E (if they're level x, make it (x/2 +1) or about that). To-hit numbers and saving throws and such should follow from the established class and level.