I would suggest you simply get some thin, yet firm,plywood(or aluminum)and make a small platform for the two satelites. Bolt the satelites onto the platform at approx. 70-90 degrees to each other.
In the middle of the platform, drill a hole just large enough for the stand's mic threads to pass through. You will need an oversized mic thread washer to put below the platform, and above the platform,a large mic clip could be screwed on.