Best prices for genuine Toyota / Lexus parts with shipping that I have found is www.irontoad.com . I order both my Lexus parts and Toyota parts for my wife's RAV-4 from them. Shipping is very reasonable. If the parts are not listed, just email your list and they send you a quote. IronToad is actually several dealerships under one ownership, two of which are Lexus and Toyota dealerships, so you are getting genuine parts.
Oliver