It's better to ask some local garages or bodywork shops for quotations. There are variable prices so some panel parts can charge up to £150ish. For the whole paint, I think minimum will be more than £500.
I got quoted £1000 for mine... (arctic white 326)
Mine is a "solid" colour....
is your red the solid "Bright" red?
or is it the "E-motion" red?....metallic?....as that will probably cost more (laquer etc...)
By the way....
if/when I do finaly get mine done I will find sombody that doesn't just quote me the lowest...but can show me their previous work standard