That was posted by Wheelie Pete on another thread...Here are the TOYOTA part #'s.
I have ordered tons of these so I know they are right.
#90341-18021 Plug w/magnet 10mm allen
$1.74 at dealer
#12157-10010 Crush style washer for plugs that go in the diffs (steel)
$0.77 at dealer
#90430-18008 Aluminum washer for plugs that go into aluminum (Transfer, Tranny, etc...)
$1.00 at dealer.
(Prices change from dealer to dealer, but I've found that some dealers will match prices. Remember, toyota dealerships are independent retailers and set their own markups. TALK THEM DOWN!)