Is there aa good 3.5mm Bluetooth TRANSMITTER?

I have a really nice pair of bluetooth speakers that don't have a 3.5mm aux jack on them, and I want to be able to sync my desktop up with them, but all I can find online are adapters that work the wrong way around (Bluetooth device, to non Bluetooth speakers).

I'm looking for something that would be able to take a non Bluetooth device, and allow it to pair with Bluetooth speakers.

Even better would be if there was a way to use an iPhone as the TRANSMITTER using the 3.5mm jack as input

If you had Google searched for "Bluetooth transmitter" you would have found hundreds of them, like this one on Amazon:
http://www.amazon.com/...B008GVETNE

Google search is a wonderful thing. Try it sometime. I think you'll like it.

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