Connecting a headset via bluetooth without using USB

[kcsl]

I'm building a gizmo and need to connect a bluetooth headset with built-in microphone. The headset is easy but the gizmo end is proving a challenge as I can't use a USB dongle and so I need access to audio input and output sockets.

I've found plenty of bluetooth transmitter/receiver devices but they are either a transmitter or a receiver... they can't do both at the same time.

Does anybody know of such a device that doesn't require USB ?

This can't be a unique thing surly... I'm hoping it's just me not searching for the right thing.

Regards,
Joe