Insurance for baggage when moving countries?

Hi folks, I am moving from the UK to Brazil next week. As expats our situation is quite unique  and I am wondering if any of the community have had experience in purchasing insurance for their belongings for transit (airport etc) and reaching destination? At present I have my world packed into three large suitcases and finding it difficult to get any headway in the numerable insurance choices that are available.

Has anyone had any experience purchasing international property insurance? I have just found a company called clements that appear to sell an insurance for transit and when working away from a home country. I am not sure how legit these types of companies are though?