I got my connectors from Halfords they were around a tenner a set
rip off Halfords disappointed now and it was next door to B&Q.
And I picked the one off the top of the stack that somebody had been in and snaffled a few of the fittings!
Probably a window cleaner / shoplifter with a hole in their hose.
Top Tip - make sure the plastic box still has the sticky tape across it before you take to the till!