As was answered in another question, the trade routes were to the East. Isn't it likely that the historical Jesus got his ideas from the East. The core of his concepts notwithstanding the cosmology were similar to Buddhism. We know that King Askoka sent emissaries through the region. http://en.wikipedia.org/wiki/Ashoka True it was 200+ years before Jesus era, but it is evidence of contact with the ideas of India.
It's incredibly unlikely.
We have some, though very little, evidence of Buddhist ideas appearing in the Hellenistic world. However to influence Jesus you would need even more than this, you would need some evidence of engagement or impact on 1st century Judaism.
Your core contention, "the cosmology were similar" [sic] is just prima facie incorrect. Cosmologically: a monotheistic religion compared to a non-theistic worldview; the centrality of grace in Christianity, compared to the concept of karma; the total absence of the idea of reincarnation in Christianity. There simply are minimal significant parallels at a theological level, let alone evidence of influence at a surface level.