I have a used and work SR20DET redtop O2 sensor (skinny, 3wire)
$40
Sr20det redtop harness, missing a few clips but it has everything you need to mate with your KA harness.
$100
Z32 Maf Sensor/Pigtail and Apexi Intake
$150
Sr20det alternator belts, PS belt and Mobil 1 EP oil filter $20
Shipping and paypal extra, pick up in central Ohio welcome!!!