Professional Tripod Mount for Ipad in Shock Case?

I use Ipad and OnForm app for coaching tennis and have it covered in a great rubber case, that of course, thickens it.

I've used and currently use a plastic tripod holder from Amazon that is not very good.

All the pro grade holders I've seen are made for use with "naked" ipads, and don't have capability to secure a shock mount case like mine.

Any thoughts or suggestions are greatly appreciated!