To contact Peter, you need to phone or use snailmail - he never bothers with email. Kim Coxon will be able to give you a first-hand comment on his experience of having a M3 repainted by CRR.
Don't know anything about Shintaro, other than i have heard that 12 months+ is now the norm for a repaint (ouch!).
Youxin Ye may also offer this service, but you would have to contact him to make sure.