BMW 1 Series rear view mirror

[Max and Paddy]

My rear view mirror is no longer attached to the windscreen, thanks to a company that was supposed to be looking after it.

It's too heavy to be reattached to the windscreen with the "normal" adhesive you can get from shops. I took it to a BMW dealership, who claimed the windscreen needs to be replaced and quoted me £1k! Obviously I won't be paying that. Any ideas on what I should do?

[Max and Paddy]

Even a BMW driver only realises how much he uses his rear view mirror once it's not there!

Thanks, Glassman. I live near Maidenhead.