TJ Power Steering Fluid Leak

I've got new marks on the ground, just below the steering gear box; and
splatter marks on the underside of the hood just above the power steering
fluid reservoir. I see no obvious leak points in this area (but the bottom
of the gear box is wet). The fluid level was a little low (not dry). I
added some fluid and it seems to steer as always. But, I'm still getting
dripping - not exactly sure of the leak point.

It's a stock 2000 TJ with 70k miles. It is driven on the weekends. It was
out for a few hours of off-roading last weekend in very hot weather. I
noticed no problems at that time. Any ideas on the likely problem - bad
pump, seals, gear box problem? How difficult to fix?



Thanks,

Cliff