Scott Disick Doing 'Amazing' in Rehab ... Still Has a Shot with Kourtney

Scott Disick is a changed man thanks to rehab, and the Kardashians are loving it ... so much so, Kourtney has NOT completely closed the door on a reconciliation.

We're told Scott spent time with his kids and some of the Kardashians Wednesday night, and seemed like "a whole new him." Our source says he's been "amazing" since checking into rehab last month, and he gets a day off here and there to see his kids.

And get this, Kourtney might still be open to patching things up. We're told it would take a LONG time for Scott to prove himself again, but it's not officially over.

Shortly before he met up with the fam, Disick was looking healthy and refreshed around Malibu.