It was interesting talking to the reporter yesterday about jackfruit — she’s a very accomplished chef (much more than me), but hasn’t really worked with jackfruit. I told her that yes, you could often find jackfruit nearby at Pete’s or Tony’s grocery stores, if you wanted to buy fresh and break it down, but to be honest, that’s a lot of work, and mostly, I like to just keep jackfruit on hand in forms that are easy to work with.
So for green jackfruit, that’s cans, usually packed in brine (it shouldn’t be very salty, but taste before adding more salt in your recipe, just in case). It’ll be cut up already — sometimes I cut it up a bit more, but you can just toss it in too. For this recipe, which is the most substantial element in my vegan meal, I combined the jackfruit with mushrooms, but you could also add chickpeas and/or cashews, if you wanted even more substance and protein. Eggplant also works well with this. Trader Joe’s reliably has green jackfruit cans, and honestly, I find it in most of our local grocery stores these days.
Using exactly the same curry sauce, you get a very different result if you use ripe jackfruit, which is fruity, like ripe mango. It works really well as an accompaniment; I wouldn’t usually use ripe jackfruit curry as the main entree, but it’s a bright, sweet note on the plate. You could also do ripe jackfruit pickle, of course, if you wanted more tang. This is much easier to make if you just buy frozen ripe jackfruit and cook with that; that’s getting easier to find — I’m pretty sure I just got this at my local Whole Foods, but if not, then Indian grocery stores are a good bet. You can also get ripe jackfruit in cans, but they’s usually packed in syrup, so I’d drain the syrup (save it for a dessert or cocktail component) before using the jackfruit itself in a curry.
If you’re vegan or vegetarian, I strongly recommend trying both green and ripe jackfruit, if you haven’t yet! And even if you aren’t vegan or vegetarian, they’re both delicious, so you should try them too. 
All of these options are available on Amazon too.
