I've been looking on and off for a set of seat covers for my Ducato for over a year now. I've looked at MH shows, dealers, supermarkets, Halfords and also many places last year while touring France and I've never found anything suitable. I didn't want plastic for obvious reasons and the fabric ones I've looked at were poorly made and looked like they would tear easily. Low and behold right on my doorstep (Stockport) is an internet based company manufacturing Motorhome seat covers for around £60 a pair. You can even go to his premises and choose your own fabric and they will custom make them. To cut a long story short, I selected a custom made pair so that I could colour match the fabric to my seating, cost me £59 and they even fitted them for me. Talk about fit like a glove; and what's more they even made reinforced slits for the chair arms and a slit in the back so you can still access the pocket behind the seat. I don't normally recommend companies or products but in my opinion, these are the Rolls Royce seat covers and priced for a mini. They do seat covers for most Motorhome manufacturers, Hymer, Peugeot, Fiat, VW etc. If anyone is interested here is their website, they are really helpful and I wouldn't hesitate to recommend their products and services.
The Home Of Motor Home Seat Covers