Pre-facelift, facelift, and RX wheels are all the same part - 78500-S03-Z70ZA. Searching EK9 Steering Wheel is all you need to do.
I recently purchased a mint wheel from @hondaaccessrareparts on Instagram, and the deal went great. I suggest you follow and wait for one to come up for sale! You can see a few pics of the one I bought at the Instagram sellers thread here: https://www.ek9.org/index.php?threads/instagram-sellers.80669/. The wheel itself was $850 USD and the shipping and paypal fees added about another $100 USD.
Ebay is a decent source as is yahoo auctions Japan, but many of those had a lot of wear for the money they were asking. The mint condition ones in Japan were asking crazy bucks ($2,700 for a new old stock wheel...) I had to go to Instagram to find a 9.5/10 condition one for a better price.