Hi Akvan. I’m afraid I don’t have a link for the original sutta or any sutta related to this. Perhaps there are others who might know and can be of more assistance.
Lal said:
“But something appears to be wrong with the above extractions from that document. ”
I think so too. Especially now after finding this from palikanon:
http://www.palikanon.com/english/pali_names/sa/satagira.htm
“Their conversation is found in the introductory gāthā of the Hemavata Sutta (q.v.). Buddhaghosa says (SNA.i.199) that, according to some, this meeting took place, not on the occasion of the first sermon, but later, when the Buddha was living in the Gotāmaka cetiya. “