So basically get it on house insurance or be ripped of.
Are insurance companies really claiming almost 1 in 10 bikes are stolen and never recovered each year.
Probably not - there's insurance premium tax to pay, plus they expect to make a profit - and it's likely that bike insurance is generally too much trouble for them. I expect they make more out of other forms of insurance.
There are a few specialist bike insurers - but they're no cheaper than anyone else.
Also, a point to watch if you manage to get your bike on your home insurance - make sure it's still covered while off the premises, as there's probably a greater chance of it being stolen while 'parked' somewhere.
My view on insurance is that unless it can't be legally avoided (i.e. motor insurance for most of us) you need to decide whether you can afford to replace whatever it is yourself.
You probably have house rebuilding insurance (compulsory if you have a mortgage). Contents insurance - maybe. A bike or an e-bike might not be worth insuring if you can afford to take the hit. Just my feeling - if you disagree with that idea it's your privilege!
Rog.