[Pharo-project] Where does Regex-Core and friends live

I am porting the latest Regex to GemStone and in the interest of Pharo compatibility, I found Regex-Core and and Regex-Tests-Core in the Pharo repository. In loading Regex-Tests-Core I found some compile errors (doubled '.', a common porting problem) in RxParserTest>>testTranslatingMatchesUsing and RxParserTest>>test, but I don't know where the home repository (other then Pharo) resides, where I could submit my updates. I've got a GemSource repository, but I'm actually hoping (haven't run tests yet:) that I will be able to use Regex-Core without making any GemStone-specific changes ... Dale