Parcel force are AFAIK the only people who will allow you to buy decent level insurance. But any of the courier firms will give you a price if you feed in the parcel dimensions and weight. I find DHL very reliable but no extra insurance last time I looked.
I use dpd ,but do not use their insurance like all parcel couriers it’s expensive ,use one of the companies like securus or similar . Parcel force are rubbish imo .