Can't comment on the hoses for all types of Nilfisk, but the E130, 140 and the C110, 120 seem the be the same type.
You'll only drag it along your paintwork once before you replace it!
The guy is on eBay that sells the replacement hoses. His name is QWashers. He will make them to any length you want, with whatever attachment you want.
Plenty of comments on this type of thing on the detailing world forum.