Bob, no exact replacements exist. Especially with the curved turnouts. You can reasonably extrapolate and replace with the built in place twist ties bases and essentially handlay. Perhaps just as important, you can do surgery and convert the opposing powered points to the short resistant (DCC friendly) approach. Several internet blogs and forums have converted the power routing mechanics of commercial turnouts over to the power static to the stock rails of the better approach.
Note that even for regular straight same numbered turnouts from one supplier to another (and sometimes by the same manufacturer in different production runs) do not overlay and replicate exactly the same geometry. You may well be best advantaged to simply pull up, replace the entire throat, and make alignment adjustments in the leads and post frog connections.
-ed-
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-ed mccamey-
COSLAR RR -
http://www.coslar.us/NMRA Standards and Conformance Department
PROTO & FINE Scale Coordinator
I estimate I have about 5 pounds of coupler springs somewhere in the vicinity of my workbench.