Using Moles with XUnit - wrong dll version

Question

I'm trying to set up Moles to use in our unit testing. We are using xunit, so I am using the Xunit extension that comes with moles (Microsoft.Moles.Framework.Xunit). However, as we are running Xunit 1.7, Moles is complaining that I am not running Version 1.6.1.1521 (with a FileLoadException).

The Moles Manual (page 28) does say:

xUnit.net Version:

1.5.0.1479 (for other xUnit.net versions, recompile the attribute from sources)

This is where I get stuck - is the source code for this xunit extension available somewhere? Or will I have to use the specific version of xunit that Moles requires?