u/BeeseChurgerMkII

I have a plan to leave the uk and do a westward circumnavigation in July on my 1979 westerly 33, probably worth around £25,000.
I cannot find anyone who will insure me fully comp and was wondering what other people have done? I know that companies don’t like to insure old boats long distance.
Do people just make do with 3rd party and accept the consequences? Or try and find local insurance as they go round?
Any help would be appreciated! Thanks