I got mine done at https://www.facebook.com/hydrographicdippingwrexham
But they may be a bit of a drive.
find someone local who does hydrodipping, sometimes called hydrographics, and ask for a quote, they will need to see exactly what you want doing so its easier if you can take your car down.
if you look up hydrographic film you can see all the different things you can have done.
any more info just ask and i will do my best to help