You cant go wrong at valetech, I have just bought some from him myself. he will make it to any length you need and put any couplings on you need. Also very knowledgable on all things pressurewashing as thats his business.
he has an ebay shop called "high pressure designs", just type "rotary cleaner" "high pressure hose" etc and you will see him listed in the shops. his name is pete.
You wont be dissapointed
regards
steve