For the past couple of years, I've been using
LEXUS 2008 LX570 Repair Manual (RM08F0U) for my '08 LX, thought it may be of some use. It's a near TIS clone, but is missing certain items like the images and text for the "components" category of each section and a few other minor things. Their site seemed to have been down the past few months but recently became accessible again. Not sure what other manuals they have, it's a Russian site and I find it a pain to navigate when translated.
Also, even thought it this doesn't work anymore, this may be of interest or work for someone else; I had discovered a way to partially access TIS anytime for free after having had subscribed to the 2-day access option just once. I saved copies of the web-pages from my browser of the service manual pages I required for a couple of small jobs. After my subscription had expired, I was going over the files I had saved. I found I was able to click on all the web-links to other sectioned referenced in the page which I had not even visited while subscribed. I was actually able to navigate through a good portion of the manual online without having to login (for at least a whole year). I tried this again last month, but it wasn't working for me, so i assume they plugged this hole in their paywall.