Ask any undertaker about the various types of hearses that are available all over the UK.
Google type and colour – there are so many!
Very few suppliers will deal with you direct.
AW Lymn of Nottingham runs probably the biggest fleet of Rolls Royces in Europe.
These are low-tech and hard work. People often take it in turns to lend a hand in the procession and feel involved.
You would probably be best off sourcing these locally.
An undertaker is the person best able to help you find one.