Is there a Speedbooster Alternative for Nikon Lenses (active mount if possible)?

I'm looking for a more affordable (than a Metaabones) speed booster for my nice collection of Nikon lenses that I have. What brands are recommended?
I know Metabones makes an active mount (autofocus/stabilization) but not one for the Nikon. Is there an active mount available for the Nikon F mount?

I only have cheaper, kit lenses for Canon and it would not be worth purchasing a speed booster for them.

You can't put Canon-mount lenses on a Nikon because they require a shorter distance between the lens mount and the sensor. Adding an adapter would just make the distance even greater.

Metabones Speedbooster is for putting lenses which were designed for a larger format such as FX onto smaller format cameras like a Micro 4/3.

There's no mount that will somehow turn a manual-focus lens into one that auto focuses. All of the auto-focusing lenses made by or for Nikon will work on any DSLR without the need for an adapter.

What are you actually trying to do? Which lenses exactly do you have and which bodies are you trying to use them on?