The pump is under and behind the reservoir. I have had some luck in the past taking them apart and cleaning and working the motor until it spun again. I'm not sure what would replace it but I bet there is something generic that would fit, it hooks to both the reservoir and the output with hoses. You just need one that is similar sized and has hose fittings in and out.
_________________
95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good
