Camped Gongo for several , several hours managed to get every piece of loot in the damn zone and was not able to pop him once.
The Auction.goonquest.com website does not have a single listing of Gorilla Hide leggings ever being tracked in EC auction. ( Gongo drop )
judging by these alla mirrors back in '01 the spawn rates should be existant at least.
http://web.archive.org/web/200107080...html?item=1299