you havent looked hard then theres loads of threads on it
converted my 2wd back from 4x4 last year

heres a list if you doing it right m8 or you can do it on the cheap

t5 gear box, bell housing, thrust bearing and shit plate
2wd fly wheel (4x4 is heavier)
gear box cradle mount
sump and complete oil pump
cross member
starter motor
steering rack
speedo cable
front hubs
front suspension
anti roll bar (very slight difference )
front brakes or make a 13mm spacer (off set wrong)
engine mounts and engine mounts that fasten to block
prop shaft
diff
drive shafts
rear subframe
you can use your 4x4 trailing arms
think thats about it