I do have one, but I am going to hold onto it. Your best bet would be to search on car-part.com for either sc300 or gs300. Within the last two weeks, junkyards in Ohio had them for sale ranging for 400-600. I am pretty sure Worthmans had 4 of them for sale at 400 a pop.
Another option is to search for lexus parts using searchtempest and deals always do come around if your patient.