The wfp suppliers do them although if you want a plastic hose connector/joiner on the quick to do a repair a motorspares shop or Halfords should do them.
yeah, motorspares saves you waiting on delivery and can carry on working, wrap it also with self amalgamating (spelling?) tape and its good to go.
Another tip I picked up from here is that when the most used length starts to wear, take it all off the reel and re-attach from the other end, will prolong its life.