WTB: Ultegra Di2 parts for TT build

I am looking to build my P3 with external Di2. I am looking for individuals parts or a group. I just need the electronic components, no need for brakes or crankset.
Thanks

I have a Dura Ace di2 tt set if you’re interested. PM me an offer

Also have a bunch of other components eg aerobars and wheels if you’re looking

i have the external battery, charger and the Short Mount, see below.

http://www.artscyclery.com/Shimano_Di2_Battery_Mount_Short_External_BMR2-S/descpage-SHDI2SEBM.html

I got battery, battery mount, and charger.
I’m still looking for cables, junction box A, shifters, and derailleurs.

Thanks,