No worries Russ. There is enough information about replacement bearings on the forum, but it's little more involved than I thought.
From reading one of John's post (https://shopsmith.com/ss_forum/viewtopi ... 53#p244253
), it looks like 203SFF is the same bearing in the 1/2HP motor. He had a comparison photo of the original bearing and the replacement box
that showed all the information I needed.
The issue with the ones I found on Amazon (Mrc 203SFF Single Row Ball Bearing https://www.amazon.com/dp/B005YS780I/re
... aFbRR8QTE3) is it doesn't list the "internal clearance". From little that I understand, it needs to be "C3".
I also just realized one of the motor bearing is push fit that I was able to easily remove =). Like the bearing I removed yesterday, it's covered in heavy grease and when spun really fast it's also making the hissing sound. This one seems to be in worst condition.