Shimano EW-WU111

[Gary E]

I'm looking at getting a Shimano EW-WU111 so that I can link up my Di2 and my Garmin Edge but they only appear to be available from unknown (to me) stores.
I'd prefer to buy from a 'reputable' source, or at least one that I've heard of, does anyone know of such a place? I'm prepared to take advice on the unknown sources if anyone has had dealings with them and can recommend.

Also, if anyone has gone down this route; I'm assuming the gadget does not come with a wire and so I'll need to get one of those too. I'm hoping to tuck it away somewhere in the frame out of sight. Can I just disconnect the wire from the battery in the seatpost and wire the EW-WU111 in series?

 

[Cycleops]

Here it is from CRC: http://www.chainreactioncycles.com/mobile/shimano-sm-ewwu111-di2-wireless-unit/rp-prod151779
No wires, its Bluetooth.

 

[Gary E]

That links says EW-WU111 but the picture is of the older unit so I'll message them to see what it is they'll actually send if I buy it (the old one is Ant+ but not Bluetooth I believe).

As for the wires; I know you don't need a wire to connect it to your Edge (or iPad) but you do need to wire it into the bikes Di2 system and, as far as I understand, you do this by unplugging any wire in the system and slaving in this unit, to do that requires an additional short wire to close the loop again - although I stand to be corrected