hey, you need an AF sensor, get them at like oxygensensors.com, i got mine there for my 2000 solara. As for the location, i'm not sure how to post the PDF but I'll try, you can email me directly if it doesn't work, i also have some other service pdfs.
brokenstuff@repairman.com
I have to change the b1s1 sensor but have yet to do so out of lazyness and preferential treatment towards my gs3... not to mention its cold outside and I don't really know what i'm doing. yay for DIY
parloc2.pdf
parloc.pdf