Adjustable holster clip?

[dallen1x]

Does anyone know of an adjustable clip or loop for changing the ride height of a holster?
I've been looking for days but I can't find exactly what I'm after.
I'm trying to find one that does not need any tools and the ride height can be adjusted on-the-fly.

Tuckable and attaches to either leather or nylon.
Here's one attachement method.
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One finger (or thumb) adjustable.
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Amazon.com: Motorola v.Series Belt Clip for V120: Electronics

Height adjustable by 2+ inches.
I'm after a quick adjustment when transitioning from sitting (car, etc) to walking.

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