Yes there was a few. One of the cars with MWM on the plate was used on the '96 RAC by Alister McRae, but I can't remembr which one.

I think L10 MWM was used by Finlay on the '94 Irish Tarmac Championship.

Then there was K200 FMC which started on a Grp N car but then became a Grp A car for Robbie Head. And there was Wilson's own car, I think that was K202 HNO or similar. Though those plates might well have been used on different shells of course, as no rally car has a simple existence!