No, its not linked anywhere from t'internet as far as I know. But heres how to do it -
Plug tomtom into computer
If you have tomtom home installed on your computer you need to sign in. If you haven't got tt home your device should prompt you to download it anyway
Once you are in tt home then click on 'Add Voices, Cameras etc' (I think -I'm doing this from memory!) then 'Images & Icons' then 'Car symbol'
From here you can search all the different icons and select which to download.
If you struggle I'll try and do a couple of screen grabs of it.