Thanks
@Nod. Happy to try...
You say you are "struggling", but have you found any that will insure the parcel? If you have, and that figure of £45 is fully insured, I think you should take it. These things aren't cheap.
You're right to observe that insurance for goods in transit is difficult and expensive. I use DPD to ship about 10,000 items per year, so I get a preferential negotiated tariff compared to the man in the street as a casual user, but even so the insurance is prohibitively expensive. The price is so high that it implies a break-even rate of about 1 loss in 100 consignments, or about 100 per year for my volume. However my experience is the loss rate is no more than a small handful per year, if that - for example, so far in 2018 they've only lost one item - so I don't bother with the insurance and I come out well ahead. Of course, that's because I have the large numbers on my side. If I were just sending one item as a one-off, I couldn't afford to skip the insurance.
If you could provide more details of the size, weight, value and destination of your parcel, I might be able to offer better advice. But the bottom line is that £45 fully insured is pro ably a good deal.