Good luck with that . . . I hope you get a helpful response, as I'd like to do the same with my Miami Classic and P229 with Holosun. If I can't find something good, my current holster could be modified with a yoke and spacer (two straps coming down on each side of the holosun instead of the existing single strap.
Perhaps the problem is hinted at in the geometry of the current holsters with one strap near the muzzle and one near the rear, about where the optic would go. They can't move that strap forward as the gun would be butt heavy, so the only option that I think would work is some sort of yoke as described, as that'll maintain the current fore and aft balance.
Perhaps the problem is hinted at in the geometry of the current holsters with one strap near the muzzle and one near the rear, about where the optic would go. They can't move that strap forward as the gun would be butt heavy, so the only option that I think would work is some sort of yoke as described, as that'll maintain the current fore and aft balance.