Unfortunately Yakima Racks and Thule Racks do not offer a canoe rack system for your 1996 Lexus LS400. However, there is an excellent alternative called the
Malone HandiRack inflatable roof rack system which is very cool. It works much better and is a lot easier to install than the canoe foam blocks temporary travel solutions.
Here's a link for a hot
Malone HandiRack inflatable roof rack video too!