Try gutter cleaning systems 01603 400679
By far the best tools to use
I've got an omnivac vac and hose had it years never had a problem with it ,but the tools are crappy to use.
I bought some gardiners ones, there not very well thought out.Just bits of bent overpriced plastic pipe
Then I got carbon poles and all the tools from gutter cleaning systems its transformed the job completely.
There made by people who actually do the job.
Oh and google 51mm silicone bends,I use one on a lot of the jobs.I got it of e bay,I think.They fit perfect on alloy or carbon poles