Most of the Alloy steering parts have been discontinued and you will only find a few places world wide that have very little stock of the items

Since Tamiya Japan no longer has stock of these items.. you best bet is going to be Tamiya USA for the Steering arms and Base.. the Bridge is sold out..... on eBay has tons of Bridges and Bases F/S.... Just the Arms

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I have a few of the items.. as spares... just incase

... or if you want to be cheap and don't care.. 3Racing sells the Arms and Bridge as a set.. but it's not as nice as the Tamiya items..and adjustability of the bridge