Hi Mick, welcome to the forum!
The Wolverhampton to London Euston Pendolinos often mix/match between services going elsewhere on the VT network as well, meaning that i can't unfortunately give you diagrams, for solely the Wolves-Euston services.
However, i can happily attach the diagrams for all VT weekday services, which include the ones you've asked for.
Please note that the extra services which were originally planned to operate from tomorrow (those stated from 26/01/09) are not operating until further notice, so please look at the diagrams for trains until Friday 23rd January 2009 for weekdays etc.
Edit- [Mostly those stated from 15/12/2008 for weekdays, although it varies]
I hope that helps you Mick.
