Have found a new seller at eBay selling few types of jackfruit (and other fruit seeds)
The most popular item there is probably the deep orange
But also 2 Thai Jackfruits with good features looks inviting
The seeds I bought sprouted on their way and are planted
and growing quick
The seller is reliable and seem he sells jackfruit seeds out of seedlings who were grown from selected fruits
Although jackfruit seedling will not grow identical to their
parent, if they came from good parent they have better chance to produce good fruits.
If someone is looking for Jackfruit seeds and cannot find any, that link might be good place to start.

4 types of Jacfruit at that eBay seller store
http://www.ebay.com/sch/cappilucypeter/m.html?

Here is a link that might be useful: 4 types of Jacfruit