Cool idea but this is not a bass used by Simon. This is a "Studio" version of a 5 string bass. Simon does not use the lower priced "studio" version, nor does he use a 5 string bass. Many times artists sign instruments that are not theirs in order to display them. Regardless, it is cool that this bass is there with Simon's signature and that someone at Disney appreciates Simon's playing.
From Rod X: "I just came back from Disneyland Resort & Walt Disney Studios in Paris and there is a roller coaster called "Rock'n'Roll Coaster". And while waiting in the queue, we walk through false recording studios where some concert posters of various artists are put on the wall, some gold record awards and few musical instruments including... a red thunderbird signed by Simon himself: "Thank you for the help. Love, Simon xx". I send you a few pictures of it. Sorry for the quality of the pics but there was a glass front..."