Can anyone tell me if there is any London/Kent based cycling shop that would provide a Garmin Edge unit (primarily Touring Edge) for a demo?

I am tired of my phone not picking up routes and it's actually getting more and more difficult to upload a GPX file into a phone and then follow it. However, I have seen too many mixed reviews and not convinced i'll be better off with a Garmin unit so wanted to try it out myself.

I'm not imagining anyone would do this but you never know.