Dark Web Monitoring offers the ability to look for my address on the dark web, however when I try to add my address I am stuck because it wants a US state and zip code. There is no option to enter an alternative country, and these fields are mandatory. Anyone know a way around this please?
Thanks xjoex. It's disappointing that this remains unresolved 2+ years later.
I loved the comment that Norton has no problem with accepting non-US address details when it relates to billing. 
I do not think it will accept non US addresses but check out this forum post from a few years back.
https://community.norton.com/en/forums/dark-web-monitoring-does-it-accept-uk-address