Hi
There is a ‘sticky thread’ on site about travel insurance which might help you.
breastcancercare.org.uk/forum/travel-insurance-tips-sticky-thread-t28027.html
Also, can I suggest you give some of the companies a ring? Result a can be different than the website. I know you have rung some companies, what I mean is do not be put of ringing one if their website says no -you might get a differrent answer once you speak with someone -I did.
You have been trying hard and soooo deserve to get cover. Trying is so stressful I know.
Have you tried insurancewith.com? I understand that is now owned by woman who started insurepink and moved on. I got cover there for North America a few months ago.
Good luck with it.