There are lots of camera insurers out there, the problem is, the proof in the pudding, you only find out how good they are when you have to make a claim.
The amount you pay also depends on your equipment, old for new can become an issue on . Example I have a 300mm f2.8 lens but its discontinued, the replacement is £5000 give or take, the cost of your equipment mounts up, because its the replacement price not its current value, hence I've got over £20k to insure (cameras, lenses).
Depending on the amount you want to insure and the maximum cost of your most expensive single item, you could look at insuring it with your house insurance