Check out www.seloc.net your local Lexus club.
The93 ES is very reliable. Make sure it got regular oil changes. Also at 130k, make sure it got a new timing belt. The lights on the inside may dim and the leather may have cracked.
There are aftermarket parts but not much and they are all from Japan. Its rare to see a hooked up ES but it can be done.

http://sr1.clublexus.com/forums/showthread.php?t=154147