On the home page, you have to click the link for your model vehicle, then put in the year, and other info. Then a category list comes up...Find your category and click the link. Then when you get the page that shows the partnumbers and prices, up near the top, you should see "Parts Listing: <More Info> <link>"
(There may be more than one link listed...each link is for a specific diagram...Click the one you want, THEN click the <More Info> button.)
Click the <More Info> button, and it will open a pop-up window with a link and a <View> button. Click the view button, and the parts diagram will open....You can zoom and scroll it.
I do exactly the same as Pluton....I always check ToyoMotorParts first to get part numbers and initial prices, and especially for the diagrams, as they seem to be the most complete, and easiest to navigate once you get the hang of it.
And yes, ToyoMotorParts used to be ToyotaPartsEast.com, and IIRC, there was a ToyotaPartsWest.com, which became ToyotaPartsZone.com...
And IIRC, they were affiliated thru the same "mother" company..??
You'll find that ToyoMotorParts has about the same prices as all other, GOOD, online OEM dealers. I've found most prices are generally only 1%-5% difference...
So it basically just comes down to:
1)finding one nearest you to save on shipping time (dont really expect to save on shipping $$ just because its closer. I've found most online sites to charge a flat (outrageous) S&H fee, (usually between $12-$17) for even the smallest parts orders)
2)Customer service and communication
3)If shipping time isnt too big of an issue within a couple days, look around any forums you're a member on, specific to your vehicle. SOmetimes online dealers sponsor the forum, and will give modest 5% discounts, or offer monthly, or special deals for forum members.
I know that Camelback Toyota (Phoenix, AZ) does this on the TundraSolutions site, Lowe Toyota does it here on Mud (I recommend them), and I'm sure there is someone who does it on TTORA, as well...