I'll have to admit that I have not used the Wiretap workflow yet, however, it sounds like you should be able to relink by following the steps in the "Autodesk and the RED ONETM Camera
Workflow Guide". Here's a section from that document that may get you there.
The XML has now been converted to a clip named
like your FCP sequence.
Select the (XML) clip and drag it to the Reel containing
your DPX (image) sequences.
You will now need to Consolidate and Reformat
the clip before you can Relink it to your media.
With the clip still selected, go to the Tools section
In the Consolidate section, set Consolidate to All
Tracks and adjust the Handles setting according to
the handle amount you set in Crimson (Wiretap).
Click Consolidate and confirm
Next, in the Unlink/Relink section, select
Reformat and carefully chose the settings that
match your DPX sequences.
Click Reformat and confirm
Then, in the Relink section, click Relink From Reel.
Your DPX sequences are now relinked to the
imported FCP XML. You can now finish the project.