This might not be where you were going with this but I would think the excessive glucose production from the liver would be triggered by low blood sugar caused by high insulin levels. So maybe the solution would be improving insulin sensitivity to turn off the gluconeogenesis pump. Is that how metformin works? I thought chromium supplementation would help this.

Exercise often leads to lowblood sugar for me so I think it might be a reverse of the problem you described. I find eating more protein and frequently is a help for the problem.