Your local electrical wholesaler should be able to get that for you -
It will depend on the size of cable required - 4mm three core rarely in stock and works out about £4 metre. For size of 2.5mm three core some sheds sell them.
Look here for previous post which explains what each element of the code is:
The properties of the cable quoted by the manufacturers seems excessive for there purpose - ceramic hob. Being able to withstand 180c I can understand but for what purpose is the -55c minimum temperature needed? Do you live in a igloo
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local