I've been taking the Porsche down for the last few years - it's now 22 years old and I still buy cover from the AA. It usually costs about £40 and I tell them I'm in the porker club. I couldn't say whether the cover is 5star but includes repatriation of the car, and passengers, hire car, accomodation if needed, etc.
A friend who has a similar Porsche filled up with some dodgy fuel on the way back from the race a few years ago. The injectors blocked up and the car finally spluttered to a halt in the middle of the tunnel up the hill out of Rouen! I tried to tow him out, and we did ok until the tow rope snapped - a bit f***ing scarey in a two lane tunnel with trucks screaming past on a Monday morning.
The AA arranged for his car to go to the Porsche Centre in Rouen, who couldn't fix it before closing time, so the AA arranged a Merc taxi from Rouen to Calais, foot passenger tickets for two on the ferry (they had tunnel tickets but no car). When they arrived in Dover a taxi collected them and took one guy to Milton Keynes and the other to Gloucestershire. The car arrived home on a low loader a week later (with all their kit safely inside - and smelling quite nice!).
Not bad for £40?