I have a 1993 LS400 and the driver's door wouldn't lock/unlock with the switch. This past weekend I ended up disassembling the entire door/removing the window/etc to get the latch assembly/door lock actuator out and tested it. While it worked, it wasn't strong enough. I ordered 2 motors from ebay and they should be in any day. There is quite a bit of discussion regarding this on the site, esp the Sticky post in the 2gs forum. http://www.clublexus.com/forums/gs-s...ators-diy.html
Short of it; search 280PT-22125 on ebay should bring up what you need, approx $8 each shipped.
I will say it was my first time taking a window/tracks and latch/actuator out and I didn't find it pleasant at all. I've figured out a way to get the track up/out of the way enough not to have to do a window removal again. I also figured out how to put the latch mechanism back together, that wasn't very pleasant either but at least when the motors arrive I can do it quicker than the first time lol.