I have no practical advice to offer, but can say from experience that the more you do the thing you fear, the less fearful it becomes. I guess that's obvious in theory, but not always so obvious in practice, since it still takes time.

One cornering skill I've read about it is putting your weight on the outside foot/leg--this is supposed to lend greater stability during cornering. Just a thought.

Best of luck in putting your cornering gremlins behind you!