As far as I am aware there are only three Vipers in the UK which have been converted to RHD, and I don't think any of these are in the UK club at this time.
Two were owned by the head of Chrysler UK, I believe one was an RT/10 and one a GTS, if memory serves me correctly the conversions were done by
Home :: Viperformance® Melbourne, Australia (03) 9729 8911, who are the only company Worldwide who are properly licensed by Chrysler/Dodge to perform the conversion. The RT/10 was stolen and burnt out a couple of years ago, and converted into a GTS lookalike.
The only other RHD Viper in the UK was a private conversion done to a GTS which was almost completely written off following an accident on UK roads.
Sorry I can't be much more help than that.