All I really needed was an extra 1/2". So, after looking around on the "interweb" last night and this morning for different clips, backers, and even holsters, I decided to try and modify my existing holster.
I took a wide single clip off of an old holster that I didn't use anymore (and had forgotten that I had), and cut off the mounting section. It was the right length and thickness, and already had two of the four holes that I would need. I drilled two more holes, and then cut it into two pieces to use as extensions.
The lower you can attach the upper holes of the clips, the higher the holster will ride. So, I attached one end of the extension (brackets) onto the lowest mounting spot on the holster (bottom arrow). Then I attached the clip, using the upper hole, to the other end of the extension (top arrow).
That gave me the 1/2" I needed for my middle finger to not rub against the belt, the pants, or the clip itself.
(before and after comparison)
My $4.95 Stealthgear Revolution has moved back to the front of the holster pack again. Well, for now anyway.