I just wanted to mention...
I can't speak for the rest of the country, but Publix is big here in Florida. I've seen Jackfruit, Durian, and a few other fruits sold in cans there. I found them at the very end of the canned fruit section, but have seen it in the 'ethnic' section a few times.. maybe your local grocer has such a section and you just haven't noticed it. I know that was the case with me!
Anyways, I purchased the Jackfruit and was surprised at how good it was! Being that Jackfruits can weigh up to 80lbs, I figure the canned stuff is the more reasonable option.
The durians were a whopping $10 per 12oz can!