I'm trying to do the same thing.....don't know the part number but are you sure the factory leather wrapped steering wheel can be installed? Can just the outer plastic wheel be removed and replaced? Thanks for your help!
If you buy that thing new it is going to cost you about $450 if I recall. I got mine from a hybrid auto recycler in the Sacramento area- Hybrid Auto Parts, 3723 Recycle Road, Rancho Cordova, CA 95742; 916.638.9111/916.638.9119 Fax. I had a brand new in the box leather wheel from Toyota and the used one from Hybrid Auto Parts and they were absolutely identical- the used must have come off a car with almost no miles. I paid $230 delivered. I thought I got a good deal and was quite happy. I would not pay the dealership prices-way to expensive. Good luck all. Oh, and yes you can replace just the steering wheel itself without all of the electronics and air bag mechanism.