Pro Micro + Bluetooth host

Hello im trying to use the Arduino pro micro as a bluetooth mouse, with a little twist.

Rather than the standard connect Arduino to PC using bluetooth i want to connect a real bluetooth mouse to the Arduino instead. For that i need an Arduino compatible host device.

I want to try reduce the latency bluetooth mice have when the PC or laptop is running intensive tasks (like playing games). from my personal experience while playing games with a bluetooth mouse, the mouse cuts out rapidly and gets messy really quick. Was playing Left4Dead2 a few weeks back and there was a 10+ second delay on the bluetooth mouse. I do have a few wired mice that dont have this problem as hey work as a HID device and theres less stuff going on the mess them up.

So my idea was to use the Arduino as a mouse HID device while getting its mouse information from the bluetooth mouse i already have. (was planning on also including a RF receiver as well) thus removing the lag from the mouse (in theory). I managed to get a quick sketch of an Arduino mouse HID working and it does remove 90% of the lag i have with the bluetooth mouse.

Are there compatible bluetooth host devices i can use, and has anyone tried making this before >