The 29-year-old hunk - who has two children, Mason, two, and three-month-old Penelope, with the brunette beauty - was spotted in Fort Lauderdale, Florida, yesterday (25.10.12) with a male friend checking out engagement bands at Levinson Jewelers.
An onlooker told RadarOnline: ''Scott was most definitely shopping for engagement rings, and all of them were large!
''Scott and his friend looked at a whole selection of amazing rings, all diamond, all different cuts, sizes, settings -- he certainly is taking his time and wants to make the right purchase.''
But Kourtney might not be the only Kardashian sister to get engaged soon as Kanye West has also reportedly been planning to pop the question to his 32-year-old girlfriend Kim Kardashian, who fuelled such speculation earlier this week when she was spotted out and about wearing a huge diamond ring.
KIIS radio show co-host Ryan Seacrest - who produces 'Keeping Up with the Kardashians' - also sparked rumours earlier this month that Kanye and Kim, who have been dating for several months, could be set to get engaged.
He hinted Kim might get more than she bargained for when Kanye whisked her off for a romantic trip to Rome to celebrate her 32nd birthday last Sunday (21.10.12).
Ryan told his co-host Ellen K: ''I think we could definitely see an update on this story on Monday.''