I drive past this place regularly and they always have a lot of smart looking (pricey) Transporters in stock;
http://www.imperialcarcentre.co.uk/
But like you say 6hr round trip for you.
I drive a 10 plate 140000 mile (company) Transporter.
It must be about due for another trip in for repair.
Been in 6 times at least in the 8 months I've had it.